concubine (n.)
c. 1300, "a paramour, a woman who cohabits with a man without being married to him;" also, in reference to Hebrew, Greek, Roman and other civilizations where the position was recognized by law, "a wife of inferior condition, a secondary wife," from Latin concubina (fem.), concubinus (masc.) "one who lives unmarried with a married man or woman." The word itself is from concumbere "to lie with, to lie together, to cohabit," from assimilated form of com "with, together" (see con-) + cubare "to lie down

cubicle (n.)
mid-15c., "bedroom, bedchamber," from Latin cubiculum "bedroom," from cubare "to lie down," which is perhaps from a PIE *kub-, in Middle Welsh kyscu, Middle Cornish koska, Middle Breton cousquet "to sleep," but de Vaan regards the PIE origin of the Latin word as "uncertain." Compare cubit

cubbyhole (n.)
"small, enclosed space," 1825, the first element possibly from a diminutive of cub "stall, pen, cattle shed, coop, hutch" (1540s), a dialect word with apparent cognates in Low German (such as East Frisian kubbing, Dutch kub). Or perhaps it is related to cuddy "small room, cupboard" (1793), originally "small cabin in a boat" (1650s), from Dutch kajuit, from French cahute. OED calls it "a nursery or children's name."

cubbyhole (n.)
a small compartment; small secluded room
Synonyms: pigeonhole

hole (n.)
Old English hol (adj.) "hollow, concave;" as a noun, "hollow place; cave; orifice; perforation," from Proto-Germanic *hulan (source also of Old Saxon, Old Frisian, Old High German hol, Middle Dutch hool, Old Norse holr, German hohl "hollow," Gothic us-hulon "to hollow out"), from PIE root *kel- (1) "to cover, conceal, save." As an adjective, it has been displaced by hollow, which in Old English was only a noun, meaning "excavated habitation of certain wild animals

On Thursday, January 27, 2022 at 4:43:48 AM UTC-5, Daud Deden wrote:
> concubine (n.)
> c. 1300, "a paramour, a woman who cohabits with a man without being married to him;" also, in reference to Hebrew, Greek, Roman and other civilizations where the position was recognized by law, "a wife of inferior condition, a secondary wife," from Latin concubina (fem.), concubinus (masc.) "one who lives unmarried with a married man or woman." The word itself is from concumbere "to lie with, to lie together, to cohabit," from assimilated form of com "with, together" (see con-) + cubare "to lie down
>
> cubicle (n.)
> mid-15c., "bedroom, bedchamber," from Latin cubiculum "bedroom," from cubare "to lie down," which is perhaps from a PIE *kub-, in Middle Welsh kyscu, Middle Cornish koska, Middle Breton cousquet "to sleep," but de Vaan regards the PIE origin of the Latin word as "uncertain." Compare cubit
>
> cubbyhole (n.)
> "small, enclosed space," 1825, the first element possibly from a diminutive of cub "stall, pen, cattle shed, coop, hutch" (1540s), a dialect word with apparent cognates in Low German (such as East Frisian kubbing, Dutch kub). Or perhaps it is related to cuddy "small room, cupboard" (1793), originally "small cabin in a boat" (1650s), from Dutch kajuit, from French cahute. OED calls it "a nursery or children's name."
>
> cubbyhole (n.)
> a small compartment; small secluded room
> Synonyms: pigeonhole
>
> hole (n.)
> Old English hol (adj.) "hollow, concave;" as a noun, "hollow place; cave; orifice; perforation," from Proto-Germanic *hulan (source also of Old Saxon, Old Frisian, Old High German hol, Middle Dutch hool, Old Norse holr, German hohl "hollow," Gothic us-hulon "to hollow out"), from PIE root *kel- (1) "to cover, conceal, save." As an adjective, it has been displaced by hollow, which in Old English was only a noun, meaning "excavated habitation of certain wild animal

cubical/cubic (adj)
mid-15c., "being of the third power;" 1550s, "having the form of a cube," from Old French cubique (14c.), from Latin cubicus, from Greek kybikos, from kybos "cube" (see cube (n.)). Meaning "solid, three-dimensional" is from 1650s. Cubical is attested from 1590s with the meaning "of or pertaining to a cube," and according to OED it is "Now more usual than cubic in this sense."

cube (n.)
1550s, "regular geometric body with six square faces," also "product obtained by multiplying the square of a quantity by the quantity itself," from French cube (13c.) and directly from Latin cubus, from Greek kybos "a six-sided die," used metaphorically of dice-like blocks of any sort, also "cake; piece of salted fish; vertebra," of uncertain origin. Beekes points out that "words for dice are often loans" and that "the Lydians claimed to have invented the game" of kybos.
The mathematical also was in the ancient Greek word: the Greeks threw with three dice; the highest possible roll was three sixes. The word was attested in English from late 14c. in Latin form. The 1960s slang sense of "extremely conventional person" (1959) is from the notion of a square squared. Cube-root is from 1550s (in Middle English this was simply a cubick).

cube (v.)
1580s in the mathematical sense "to raise to the third power" (in Middle English the verb was cubiken, mid-15c.); 1947 with the meaning "cut in cubes," from cube (n.). The Greek verbal derivatives from the noun all referred to dice-throwing and gambling

On Thursday, January 27, 2022 at 7:06:04 AM UTC-5, Daud Deden wrote:
> On Thursday, January 27, 2022 at 4:43:48 AM UTC-5, Daud Deden wrote:
> > concubine (n.)
> > c. 1300, "a paramour, a woman who cohabits with a man without being married to him;" also, in reference to Hebrew, Greek, Roman and other civilizations where the position was recognized by law, "a wife of inferior condition, a secondary wife," from Latin concubina (fem.), concubinus (masc.) "one who lives unmarried with a married man or woman." The word itself is from concumbere "to lie with, to lie together, to cohabit," from assimilated form of com "with, together" (see con-) + cubare "to lie down
> >
> > cubicle (n.)
> > mid-15c., "bedroom, bedchamber," from Latin cubiculum "bedroom," from cubare "to lie down," which is perhaps from a PIE *kub-, in Middle Welsh kyscu, Middle Cornish koska, Middle Breton cousquet "to sleep," but de Vaan regards the PIE origin of the Latin word as "uncertain." Compare cubit
> >
> > cubbyhole (n.)
> > "small, enclosed space," 1825, the first element possibly from a diminutive of cub "stall, pen, cattle shed, coop, hutch" (1540s), a dialect word with apparent cognates in Low German (such as East Frisian kubbing, Dutch kub). Or perhaps it is related to cuddy "small room, cupboard" (1793), originally "small cabin in a boat" (1650s), from Dutch kajuit, from French cahute. OED calls it "a nursery or children's name."
> >
> > cubbyhole (n.)
> > a small compartment; small secluded room
> > Synonyms: pigeonhole
> >
> > hole (n.)
> > Old English hol (adj.) "hollow, concave;" as a noun, "hollow place; cave; orifice; perforation," from Proto-Germanic *hulan (source also of Old Saxon, Old Frisian, Old High German hol, Middle Dutch hool, Old Norse holr, German hohl "hollow," Gothic us-hulon "to hollow out"), from PIE root *kel- (1) "to cover, conceal, save." As an adjective, it has been displaced by hollow, which in Old English was only a noun, meaning "excavated habitation of certain wild animal
> cubical/cubic (adj)
> mid-15c., "being of the third power;" 1550s, "having the form of a cube," from Old French cubique (14c.), from Latin cubicus, from Greek kybikos, from kybos "cube" (see cube (n.)). Meaning "solid, three-dimensional" is from 1650s. Cubical is attested from 1590s with the meaning "of or pertaining to a cube," and according to OED it is "Now more usual than cubic in this sense."
>
> cube (n.)
> 1550s, "regular geometric body with six square faces," also "product obtained by multiplying the square of a quantity by the quantity itself," from French cube (13c.) and directly from Latin cubus, from Greek kybos "a six-sided die," used metaphorically of dice-like blocks of any sort, also "cake; piece of salted fish; vertebra," of uncertain origin. Beekes points out that "words for dice are often loans" and that "the Lydians claimed to have invented the game" of kybos.
> The mathematical also was in the ancient Greek word: the Greeks threw with three dice; the highest possible roll was three sixes. The word was attested in English from late 14c. in Latin form. The 1960s slang sense of "extremely conventional person" (1959) is from the notion of a square squared. Cube-root is from 1550s (in Middle English this was simply a cubick).
>
> cube (v.)
> 1580s in the mathematical sense "to raise to the third power" (in Middle English the verb was cubiken, mid-15c.); 1947 with the meaning "cut in cubes," from cube (n.). The Greek verbal derivatives from the noun all referred to dice-throwing and gambling

cubit (n.)
ancient unit of measure (usually from 18 to 22 inches) based on the forearm from elbow to fingertip, early 14c., from Latin cubitum, cubitus "the elbow, the forearm," generally regarded as a derivative of PIE *keu(b)- "to bend," but de Vaan finds this dubious based on the sense of the proposed cognates and the sound changes involved. Also compare cubicle.

It seems much safer to assume that cubitus 'elbow' is a specific instance of the ppp. cubitus of the verb cubare 'to lie down'. People lie down on their elbow if they sleep on their side, and the Romans even reclined when dining. It matters little whether the original meaning was 'forearm' or 'the elbow joint'. One may even suggest that the verb cubitare 'to lie down' ... is not (only) a frequentative to cubare, but (also) arose as a denominative 'to rest on the elbow' to cubitus. [de Vaan]
Such a measure, known by a word meaning "forearm" or the like, was known to many peoples (compare Greek pekhys, Hebrew ammah, English ell).

The word also was used in English in the "forearm, part of the arm from the elbow downward" sense (early 15c.); hence cubital "as long as a cubit" (mid-15c.), also "pertaining to the forearm"