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pronounceable (adj.)[pronounceable 词源字典]: 1610s, from pronounce (v.) + -able.[pronounceable etymology, pronounceable origin, 英语词源]
pronounced (adj.): "spoken," 1570s, past participle adjective from pronounce (v.). Sense of "emphatic" is a figurative meaning first attested c. 1730.
pronouncement (n.): 1590s, from pronounce + -ment.
pronto (adv.): 1850, from Spanish pronto, perhaps influenced by Italian pronto (borrowed by English 1740), both from Latin promptus (see prompt).
pronunciation (n.): early 15c., "mode in which a word is pronounced," from Middle French prononciation and directly from Latin pronuntiationem (nominative pronuntiatio) "act of speaking, utterance, delivery," also "proclamation, public declaration," noun of action from past participle stem of pronuntiare "announce" (see pronounce).
proof (n.): early 13c., preove "evidence to establish the fact of (something)," from Anglo-French preove, Old French prueve "proof, test, experience" (13c., Modern French preuve), from Late Latin proba "a proof," a back-formation from Latin probare "to prove" (see prove). "The devocalization of v to f ensued upon the loss of final e; cf. the relation of v and f in believe, belief, relieve, relief, behove, behoof, etc. [OED].

Meaning "act of proving" is early 14c. Meaning "act of testing or making trial of anything" is from late 14c., from influence of prove. Meaning "standard of strength of distilled liquor" is from 1705. In photography from 1855. Typographical sense of "trial impression to test type" is from c. 1600. Numismatic sense of "coin struck to test a die" is from 1762; now mostly in reference to coins struck from highly polished dies, mainly for collectors.

Adjectival sense (proof against) is recorded from 1590s, from the noun in expressions such as proof of (mid-15c.), hence extended senses involving "tested power" in compounds such as fireproof (1630s), waterproof (1725), foolproof (1902), etc. Shakespeare has shame-proof. Expression the proof is in the pudding (1915) is a curious perversion of earlier proof of the pudding is in the eating (1708), with proof in the sense "quality of proving good or turning out well" (17c.); perhaps an advertiser's condensed form of the original.
proof (v.): 1834, "to test," from proof (n.). From 1950 as short for proofread (v.). Related: Proofed; proofing.
proofread (v.): also proof-read, 1878, back-formation from proofreader. Related: Proofread; Proofreading.
proofreader (n.): also proof-reader, 1808, from proof (n.) in the typographical sense + reader.
prop (v.): "to support," mid-15c., probably from prop (n.1) or a related verb in Dutch. Related: Propped; propping.
prop (n.1): "support," mid-15c., from Middle Dutch proppe "vine prop, support," of unknown origin. Probably related to Old High German pfropfo, German pfropfen "to prop," perhaps from Latin propago "a set, layer of a plant" (see propagation). Irish propa, Gaelic prop are from English.
prop (n.2): "object used in a play," 1898, from props (1841), shortened form of properties (which was in theatrical use from early 15c.). Props as slang shortening for proper respects (or something similar) appeared c. 1999.
prop (n.3): short for propeller, 1914.
propaedeutic (n.): 1798, from Greek propaideuein "to teach beforehand," from pro- (see pro-) + paideuein "to teach," which is related to the root of pedagogue. From 1849 as an adjective.
propaganda (n.): 1718, "committee of cardinals in charge of Catholic missionary work," short for Congregatio de Propaganda Fide "congregation for propagating the faith," a committee of cardinals established 1622 by Gregory XV to supervise foreign missions. The word is properly the ablative fem. gerundive of Latin propagare (see propagation). Hence, "any movement to propagate some practice or ideology" (1790). Modern political sense dates from World War I, not originally pejorative. Meaning "material or information propagated to advance a cause, etc." is from 1929.
propagandist (n.): 1797, from propaganda + -ist. Related: Propagandistic.
propagandize (v.): 1841, from propaganda + -ize. Related: Propagandized; propagandizing.
propagate (v.): 1560s, "to cause to multiply," from Latin propagatus, past participle of propagare "to set forward, extend, procreate" (see propagation). Intransitive sense "reproduce one's kind" is from c. 1600. Related: Propagated; propagating.
propagation (n.): mid-15c., from Old French propagacion "offshoot, offspring" (13c.) and directly from Latin propagationem (nominative propagatio) "a propagation, extension, enlargement," noun of action from past participle stem of propagare "set forward, extend, spread, increase; multiply plants by layers, breed," from propago (genitive propaginis) "that which propagates, offspring," from pro- "forth" (see pro-) + *pag-, root of pangere "to fasten" (see pact).
propane (n.): "colorless gas occurring in petroleum," 1866, with chemical suffix -ane + prop(ionic acid) (1850), from French propionique (1847), from Greek pro "forward" (see pro-) + pion "fat" (see fat (adj.)), in reference to its being first in order of the fatty acids.