opposeyoudaoicibaDictYouDict
oppose: [14] Oppose is in origin an Old French re-formation of Latin oppōnere, based on poser (source of English pose). Oppōnere was a compound verb formed from the prefix ob- ‘against’ and pōnere ‘put’ (source also of English position, posture, etc). It originally meant literally ‘set against’, but developed various figurative senses, including ‘oppose in argument’, which is how it was originally used when it arrived in English.

The notions of ‘contention’ and ‘prevention’ have remained uppermost in the English verb, as they have in opponent [16], which comes from the present participle of the Latin verb. But opposite [14] (from the Latin past participle) retains another metaphorical strand that began in Latin, of ‘comparison’ or ‘contrast’.

=> pose, position, posture
opposable (adj.)youdaoicibaDictYouDict
1660s, "capable of being withstood," from oppose + -able. In reference to human thumbs, from 1833. Related: Opposability.
oppose (v.)youdaoicibaDictYouDict
late 14c., from Old French oposer "oppose, resist, rival; contradict, state opposing point of view" (12c.), from poser "to place, lay down" (see pose (v.1)), blended with Latin opponere "oppose, object to, set against" (see opponent). Related: Opposed; opposing.
opposite (adj.)youdaoicibaDictYouDict
late 14c., "placed on the other side of (something)," from Old French oposite "opposite, contrary" (13c.), from Latin oppositus "standing against, opposed, opposite," past participle of opponere "set against" (see opponent). Meaning "contrary in nature or character" is from 1570s. As a noun from late 14c. As a preposition from 1758. As an adverb from 1817. Related: Oppositely.
opposition (n.)youdaoicibaDictYouDict
late 14c., an astrological term for the situation of two heavenly bodies exactly across from one another in the heavens, from Old French oposicion (12c.) or directly from Latin oppositionem (nominative oppositio) "act of opposing, a placing against," noun of action from past participle stem of opponere "set against" (see opponent). Meaning "that which is opposite something else" is from 1540s; meaning "contrast, antagonism" first attested 1580s; sense of "political party opposed to the one in power" is from 1704. Related: Oppositional.
unopposed (adj.)youdaoicibaDictYouDict
1650s, from un- (1) "not" + past participle of oppose (v.).