late 14c., "reduce in rank, etc.," from Old French abaissier "diminish, make lower in value or status; lower oneself" (12c.), literally "bend, lean down," from Vulgar Latin *ad bassiare "bring lower," from ad "to, toward" (see ad-) + Late Latin bassus "low, short" (see base (adj.)).

The form in English was altered 16c. by influence of base (adj.), making the word an exception to the rule that Old French verbs with stem -iss- enter English as -ish (comprehension might have played a role; earlier forms of abase often are identical with those of abash). Literal sense of "lower, depress" (late 15c.) is archaic or obsolete. Related: Abased; abasing.

1540s, "excessively modest, shy and sheepish," with -ful + baishen "to be filled with consternation or dismay" (mid-14c.), from Old French baissier "bring down, humiliate" (see abash). An unusual case of this suffix attached to a verbal stem in the passive sense. Related: Bashfully; bashfulness (1530s).

1520s, "state of expectation," from Anglo-French abeiance "suspension," also "expectation (especially in a lawsuit)," from Old French abeance "aspiration, powerful desire," noun of condition from abeer "aspire after, gape, open wide," from à "at" (see ad-) + ba(y)er "be open," from Latin *batare "to yawn, gape" (see abash).

Originally in French a legal term, "condition of a person in expectation or hope of receiving property;" it turned around in English law to mean "condition of property temporarily without an owner" (1650s). Hence "state of suspended action or existence." The French verb baer is also the source of English bay (n.2) "recessed space," as in bay window.

"light railery, playful banter," 1650s, from French badinage "playfulness, jesting," from badiner (v.) "to jest, joke," from badin "silly, jesting" (16c.), from Old Provençal badar "to yawn, gape," from Late Latin badare "to gape," from *bat- "to yawn" (see abash). One who indulges in it is a badineur.

"not confused with shame or through modesty," 1570s, from un- (1) "not" + past participle of abash (v.). Related: Unabashedly.

word-forming element, in English meaning usually "out of, from," but also "upwards, completely, deprive of, without," and "former;" from Latin ex "out of, from within; from which time, since; according to; in regard to," from PIE *eghs "out" (source also of Gaulish ex-, Old Irish ess-, Old Church Slavonic izu, Russian iz). In some cases also from Greek cognate ex, ek. PIE *eghs had comparative form *eks-tero and superlative *eks-t(e)r-emo-. Often reduced to e- before -b-, -d-, -g-, consonantal -i-, -l-, -m-, -n-, -v- (as in elude, emerge, evaporate, etc.).