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cachet [cachet 词源字典]: cachet: [17] Cachet was a Scottish borrowing of a French word which originally meant ‘seal affixed to a letter or document’. In the 19th century this developed into the figurative ‘personal stamp, distinguishing characteristic’, which, through its use in the context of distinguished or fashionable people or things, has come to mean ‘prestige’. The original notion contained in the word is of ‘pressing’.

It comes via the medieval French verb cacher ‘press’ from Latin coactāre ‘constrain’. This was a derivative of coact-, the past participial stem of cōgere ‘drive together’ (source of English cogent), a compound verb formed from con- ‘together’ and agere ‘drive’ (source of English act and a host of other derivatives from agent to prodigal).

Modern French cacher means ‘hide’, which is the source of cache ‘hoard’, borrowed by English in the 19th century.
=> cache, cogent[cachet etymology, cachet origin, 英语词源]
squat: squat: [13] Someone who squats is etymologically ‘forced together’ – and indeed the verb originally meant ‘squash, flatten’ in English (‘This stone shall fall on such men, and squat them all to powder’, John Wyclif, Sermons 1380). Not until the early 15th century did the modern sense (based on the notion of hunching oneself up small and low) emerge. The word was adapted from Old French esquatir, a compound verb formed from the intensive prefix es- and quatir ‘press flat’.

This in turn came from Vulgar Latin *coactīre ‘press together’, a verb based on Latin coāctus, the past participle of cōgere ‘force together’ (from which English gets cogent [17]). The adjectival use of squat for ‘thickset’, which preserves some of the word’s original connotations of being ‘flattened’, is first recorded in 1630. Swat ‘slap’ [17] originated as a variant of squat.
=> cogent, swat
cache (n.): 1797, "hiding place," from French Canadian trappers' slang, "hiding place for stores" (1660s), a back-formation from French cacher "to hide, conceal" (13c., Old French cachier), from Vulgar Latin *coacticare "store up, collect, compress," frequentative of Latin coactare "constrain," from coactus, past participle of cogere "to collect" (see cogent). Sense extended by 1830s to "anything stored in a hiding place."
cachet (n.): 1630s, Scottish borrowing of French cachet "seal affixed to a letter or document" (16c.), from Old French dialectal cacher "to press, crowd," from Latin coactare "constrain" (see cache). Meaning evolving through "(letter under) personal stamp (of the king)" to "prestige." Compare French lettre de cachet "letter under seal of the king."
squat (v.): mid-14c., "to crush;" early 15c., "crouch on the heels," from Old French esquatir, escatir "compress, press down, lay flat, crush," from es- "out" (see ex-) + Old French quatir "press down, flatten," from Vulgar Latin *coactire "press together, force," from Latin coactus, past participle of cogere "to compel, curdle, collect" (see cogent). Meaning "to settle on land without any title or right" is from 1800. Related: Squatted; squatting.