"elementary sound of a spoken language, one of the primary elements of utterance," 1866, from Greek phōnē "sound, voice" (from PIE root *bha- (2) "to speak, tell, say").
by 1944, American English, reflecting a white Southern U.S. pronunciation of Negro, but it was held to be a compromise made by those whites who had learned to not say nigger but could not bring themselves to say Negro, and it was thus deemed (in the words of a 1960 slang dictionary) "even more derog[atory] than 'nigger.' "
i.e. means that is to say, & introduces another way (more comprehensible to the hearer, driving home the speaker's point better, or otherwise preferable) of putting what has been already said; it does not introduce an example, & when substituted for e.g. in that function ... is a blunder. [Fowler]
1570s, "use quips; assail with clever, sarcastic remarks," from quip (n.). The sense of "to say or reply as a quip" is by 1950. Related: Quipped; quipping.