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Origin and history of quiddity

quiddity(n.)

"a trifling nicety in argument, a quibble," 1530s, from Medieval Latin quidditas "the essence of things," in Scholastic philosophy, "that which distinguishes a thing from other things," literally "whatness," from Latin quid "what," neuter of indefinite pronoun quis "somebody, someone or other" (from PIE root *kwo-, stem of relative and interrogative pronouns).

The sense developed from scholastic disputes over the nature of things. Original classical meaning "real essence or nature of a thing, that which distinguishes a thing from other things and makes it what it is" is attested in English from late 14c. (quidite).

Entries linking to quiddity

"a sovereign, one pound sterling," 1680s, British slang, possibly from quid "that which is, essence," (c. 1600, see quiddity), as used in quid pro quo (q.v.), or directly from Latin quid "what, something, anything," neuter singular of relative pronoun qui "who" (from PIE root *kwo-, stem of relative and interrogative pronouns).

Compare French quibus, noted in Barrêre's dictionary of French argot (1889) as a word for "money, cash," said to be short for quibus fiunt omnia (see quibble (n.)).

1610s, translating the Latin source of quiddity, from what + -ness.

also *kwi-, Proto-Indo-European root, stem of relative and interrogative pronouns.

It might form all or part of: cheese (n.2) "a big thing;" cue (n.1) "stage direction;" either; hidalgo; how; kickshaw; neither; neuter; qua; quality; quandary; quantity; quasar; quasi; quasi-; query; quibble; quiddity; quidnunc; quip; quodlibet; quondam; quorum; quote; quotidian; quotient; ubi; ubiquity; what; when; whence; where; whether; which; whither; who; whoever; whom; whose; why.

It might also be the source of: Sanskrit kah "who, which;" Avestan ko, Hittite kuish "who;" Latin quis/quid "in what respect, to what extent; how, why," qua "where, which way," qui/quae/quod "who, which;" Lithuanian kas "who;" Old Church Slavonic kuto, Russian kto "who;" Old Irish ce, Welsh pwy "who;" Old English hwa, hwæt, hwær, etc.

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