úpa ind. (a preposition or prefix to verbs and nouns, expressing) towards, near to (opposed to apa, away), by the side of, with, together with, under, down (e.g. upa-√ gam, to go near, undergo; upa-gamana, approaching; in the Veda the verb has sometimes to be supplied from the context, and sometimes is placed after the verb to which it belongs, e.g. āyayur upa = upāyayuḥ, they approached). (As unconnected with verbs and prefixed to nouns expresses) direction towards, nearness, contiguity in space, time, number, degree, resemblance, and relationship, but with the idea of subordination and inferiority (e.g. upa-kaniṣṭhikā, the finger next to the little finger; upa-purāṇam, a secondary or subordinate Purāṇa; upa-daśa, nearly ten)
sometimes forming with the nouns to which it is prefixed compound adverbs (e.g. upa-mūlam, at the root; upa-pūrva-rātram, towards the beginning of night; upa-kūpe, near a well) which lose their adverbial terminations if they are again compounded with nouns (e.g. upakūpa-jalāśaya, a reservoir in the neighbourhood of a well)
prefixed to proper names may express in classical literature ‘a younger brother’ (e.g. upendra, ‘the younger brother of Indra’), and in Buddhist literature ‘a son’. (As a separable adverb rarely expresses) thereto, further, moreover (e.g. tatropa brahma yo veda, who further knows the Brahman), [RV.]; [AV.]; [ŚBr.]; [PārGṛ.] (As a separable preposition) near to, towards, in the direction of, under, below (with acc., e.g. upa āśāḥ, towards the regions)
near to, at, on, upon
at the time of, upon, up to, in, above (with loc., e.g. upa sānuṣu, on the tops of the mountains)
with, together with, at the same time with, according to (with inst., e.g. upa dharmabhiḥ, according to the rules of duty), [RV.]; [AV.]; [ŚBr.] , besides the meanings given above, is said by native authorities to imply disease, extinction; ornament; command; reproof; undertaking; giving; killing; diffusing; wish; power; effort; resemblance, &c.;
[cf. Zd. upa; Gk. ὑπό; Lat. sub; Goth. uf; Old Germ. oba; Mod. Germ. ob in Obdach, obliegen, &c.]