curry favoryoudaoicibaDictYouDict
verbal phrase, early 16c., altered by folk etymology from curry favel (c. 1400) from Old French correier fauvel "to be false, hypocritical," literally "to curry the chestnut horse," which in medieval French allegories was a symbol of cunning and deceit. For the verb, see curry (v.). Old French fauvel (later fauveau) "fallow, dun," though the exact color intended in the early uses is vague, is a diminutive of fauve fawn-colored horse, dark-colored thing, dull," for which see Fauvist. The secondary sense here is entangled with similar-sounding Old French favele "lying, deception," from Latin fabella, diminutive of fabula (see fable (n.)). In Middle English, favel was a common name for a horse.
disentangle (v.)youdaoicibaDictYouDict
1590s; see dis- + entangle. Related: Disentangled; disentangling.
embarrassment (n.)youdaoicibaDictYouDict
1670s, "state of being impeded, obstructed, or entangled" (of affairs, etc.), from embarrass + -ment, or from French embarrassement, from embarrasser.

As "a mental state of unease," from 1774. Meaning "thing which embarrasses" is from 1729. Earlier words expressing much the same idea include baishment "embarrassment, confusion" (late 14c.); baishednesse (mid-15c.).
entangle (v.)youdaoicibaDictYouDict
early 15c., from en- (1) + tangle (n.). Related: Entangled; entangling.
flush (n.)youdaoicibaDictYouDict
The section of entries for the various flushes in Century Dictionary opens with a caveat:
The several words spelled flush, being mostly dialectal, colloquial, or technical, and scantily recorded in early literature, have become partly confused with one another, and cannot now be entirely disentangled. Words originally different have acquired some meanings very nearly identical, while on the other hand there are some meanings not obviously related which are, nevertheless, to be referred to one original.
Weekley calls it "A very puzzling word." Sense of "a rush of water" in a stream (1520s), is probably from flush (v.1). From this likely come the extended senses "rush of emotion or passion" (1610s); "a sudden shooting up" (1773); "act of cleansing (a drain) by flushing" (1883); "glow of light or color" (especially sudden redness in the face), 1620s. Independently from the verb, probably, is the noun sense of "a flight of birds suddenly started up" (1590s).

The meaning "hand of cards all of one suit" (1520s) is of uncertain origin, perhaps formed on the model of Middle French flus (15c.), from Old French flux, flus "a flowing, rolling" (see flux), which, in common with its Italian cognate flusso, is said to have once had a sense of "a run" of cards. The form in English probably was influenced by flush (v.1).
foul (v.)youdaoicibaDictYouDict
Old English fulian "to become foul, rot, decay," from ful (see foul (adj.)). Transitive meaning "make foul, pollute" is from c. 1200. Meaning "become entangled" (chiefly nautical) is from 1832, probably from foul (adj.) in the sense "obstructed by anything fixed or attached" (late 15c.). "A term generally used in contrast to clear, and implies entangled, embarrassed or contrary to: e.g. to foul the helm, to find steerage impracticable owing to the rudder becoming entangled with rope or other gear" [Sir Geoffrey Callender, "Sea Passages," 1943]. Related: Fouled; fouling. Hence also foul anchor (1769), one with the slack of the cable twisted round the stock or a fluke; noted by 1832 as naval insignia.
gadfly (n.)youdaoicibaDictYouDict
also gad-fly, 1620s, "fly which bites cattle," probably from gad (n.) "goad, metal rod," here in the sense of "stinger;" but the sense is entangled with gad (v.) "rove about" (on the notion, perhaps, of the insect's power of flight or of the restlessness of animals plagued by them), and another early meaning of gadfly was "someone who likes to go about, often stopping here and there" (1610s). Sense of "one who irritates another" is from 1640s (equivalent of Latin oestrus; see estrus). "In strictness, only the females are gadflies, the males being smaller and quite inoffensive, living on juices of plants" [Century Dictionary]. Earlier bot-fly, from bot "skin parasite" (late 15c.).
gawk (v.)youdaoicibaDictYouDict
"stare stupidly," 1785, American English, of uncertain origin. Perhaps [Watkins] from gaw, a survival from Middle English gowen "to stare" (c. 1200), from a Scandinavian source akin to Old Norse ga "to heed," from Proto-Germanic *gawon, from PIE *ghow-e- "to honor, revere, worship" (see favor (n.)); and altered perhaps by gawk hand (see gawky). Liberman finds this untenable and writes that its history is entangled with that of gowk "cuckoo," which is from Scandinavian, but it need not be from that word, either. Nor is French gauche (itself probably from Germanic) considered a likely source. "It is possibly another independent imitative formation with the structure g-k" (compare geek). From 1867 as a noun. Related: Gawked; gawking.
inexplicable (adj.)youdaoicibaDictYouDict
early 15c., from Middle French inexplicable or directly from Latin inexplicabilis "that cannot be unfolded or disentangled, very intricate," figuratively, "inexplicable," from in- "not, opposite of" (see in- (1)) + explicabilis "that may be explained" (see explicable). Related: Inexplicably.
inextricable (adj.)youdaoicibaDictYouDict
early 15c., from Latin inextricabilis "that cannot be disentangled," from in- "not, opposite of" (see in- (1)) + extricare (see extricate). Related: Inextricably.
intricate (adj.)youdaoicibaDictYouDict
early 15c., from Latin intricatus "entangled," past participle of intricare "to entangle, perplex, embarrass," from in- "in" (see in- (2)) + tricae (plural) "perplexities, hindrances, toys, tricks," of uncertain origin (compare extricate). Related: Intricately.
perplex (v.)youdaoicibaDictYouDict
late 14c. as an adjective, "perplexed, puzzled, bewildered," from Latin perplexus "involved, confused, intricate;" but Latin had no corresponding verb *perplectere. The Latin compound would be per "through" (see per) + plexus "entangled," past participle of plectere "to twine, braid, fold" (see complex (adj.)).

The form of the English adjective shifted to perplexed by late 15c., probably to conform to other past participle adjectives. The verb is latest attested of the group, in 1590s, evidently a back-formation from the adjective. Related: Perplexing, which well describes the history of the word.
perplexity (n.)youdaoicibaDictYouDict
c. 1300, "bewilderment," from Old French perplexite "confusion, perplexity," from Late Latin perplexitatem (nominative perplexitas), from Latin perplexus "confused, involved, interwoven," from per- "completely" + plexus "entangled," past participle of plectere "to twine" (see complex (adj.)). From 1590s as "something that causes perplexity."
snarl (v.1)youdaoicibaDictYouDict
"to tangle, to catch in a snare or noose" (trans.), late 14c., from a noun snarl "a snare, a noose" (late 14c.), probably a diminutive of snare (n.1). Intransitive sense "become twisted or entangled" is from c. 1600. Related: Snarled; snarling.