black comedy n.

Old English blæc "absolutely dark, absorbing all light, of the color of soot or coal," from Proto-Germanic *blakaz "burned" (source also of Old Norse blakkr "dark," Old High German blah "black," Swedish bläck "ink," Dutch blaken "to burn"), from PIE *bhleg- "to burn, gleam, shine, flash" (source also of Greek phlegein "to burn, scorch," Latin flagrare "to blaze, glow, burn"), from root *bhel- (1) "to shine, flash, burn." The usual Old English word for "black" was sweart (see swart).

The same root produced Middle English blake "pale," from Old English blac "bright, shining, glittering, pale;" the connecting notions being, perhaps, "fire" (bright) and "burned" (dark), or perhaps "absence of color." According to OED, in Middle English "it is often doubtful whether blac, blak, blake, means 'black, dark,' or 'pale, colourless, wan, livid' "; and the surname Blake can mean either "one of pale complexion" or "one of dark complexion."  

Black was used of dark-skinned people in Old English. Of coffee with nothing added, attested by 1796. The meaning "fierce, terrible, wicked" is from late 14c. The figurative senses often come from the notion of "without light," moral or spiritual. Latin niger had many of the same figurative senses ("gloomy; unlucky; bad, wicked, malicious"). The metaphoric use of the Greek word, melas, however, tended to reflect the notion of "shrouded in darkness, overcast." In English it has been the color of sin and sorrow at least since c. 1300; the sense of "with dark purposes, malignant" emerged 1580s (in black art "necromancy;" it is also the sense in black magic). 

Black drop (1823) was a liquid preparation of opium, used medicinally. Black-fly (c. 1600) was a name given to various insects, especially an annoying pest of the northern American woods. Black Prince as a nickname of the eldest son of Edward III is attested by 1560s; the exact signification is uncertain. Black flag, flown (especially by pirates) as a signal of no mercy, is from 1590s. Black dog "melancholy" is attested from 1826.

Black belt is from 1870 in reference to district extending across the U.S. South with heaviest African population (also sometimes in reference to the fertility of the soil); it is attested from 1913 in the judo sense, worn by one who has attained a certain high degree of proficiency. Black power is from 1966, associated with Stokely Carmichael. Black English "English as spoken by African-Americans," is by 1969. The Black Panther (1965) movement was an outgrowth of Student Nonviolent Co-ordinating Committee. Black studies is attested from 1968.

late 14c., "narrative with a happy ending; any composition intended for amusement," from Old French comedie (14c.), "a poem" (not in the theatrical sense) and directly from Latin comoedia, from Greek kōmōidia "a comedy, amusing spectacle," probably [Beekes] from kōmōidos "actor or singer in the revels," from kōmos "revel, carousal, merry-making, festival" + aoidos "singer, poet," from aeidein "to sing," which is related to ōidē (see ode).

The passage on the nature of comedy in the Poetic of Aristotle is unfortunately lost, but if we can trust stray hints on the subject, his definition of comedy (which applied mainly to Menander) ran parallel to that of tragedy, and described the art as a purification of certain affections of our nature, not by terror and pity, but by laughter and ridicule. [Rev. J.P. Mahaffy, "A History of Classical Greek Literature," London, 1895]

The origin of Greek komos is uncertain; perhaps it is from a PIE *komso- "praise," and cognate with Sanskrit samsa "praise, judgment." Beekes suggests Pre-Greek. The old derivation from kome "village" is not now regarded.

The classical sense of the word was "amusing play or performance with a happy ending," which is similar to the modern one, but in the Middle Ages the word meant poems and stories generally (albeit ones with happy endings), such as Dante's "Commedia." The revival of learning 16c. recovered the ancient comedies and shifted the sense of the word to "branch of drama addressing primarily the humorous and ridiculous" (opposed to tragedy). In 18c. this was somewhat restricted to "humorous, but not grossly comical, drama" (opposed to farce).

Comedy aims at entertaining by the fidelity with which it presents life as we know it, farce at raising laughter by the outrageous absurdity of the situation or characters exhibited, & burlesque at tickling the fancy of the audience by caricaturing plays or actors with whose style it is familiar. [Fowler]

Meaning "comic play or drama" is from 1550s (the first modern comedy in English was said to be Nicholas Udall's "Roister Doister"). Extended sense "humorous or comic incident or events in life" is from 1560s. Generalized sense of "quality of being amusing" dates from 1877.