From enanti; opposite; figuratively, antagonistic -- (over) against, contrary.
see GREEK enanti
1. primarily of place; opposite, contrary: of the wind (Xenophon, an. 4, 5, 3), Matthew 14:24; Mark 6:48; Acts 27:4; ἐξ ἐναντίας (Winers Grammar, 591 (550); Buttmann, 82 (71)), opposite, over against (see ἐκ, I. 4), with the genitive Mark 15:39.
2. metaphorically, opposed as an adrersary, hostile, antagonistic in feeling or act: 1 Thessalonians 2:15 (on which passage (for confirmatory references to ancient authors) cf. Grimm on 3Macc. 7:4 (on the other hand, see Lünem. on 1 Thess. l. c.)); ὁ ἐξ ἐναντίας, an opponent (A. V. he that is of the contrary part), Titus 2:8; ἐναντίον ποιεῖν τί τίνι, to do something against one, Acts 28:17; ἐναντία πράττειν πρός τό ὄνομα τίνος, Acts 26:9. Neuter ἐναντίον, adverb, as a preposition is construction with the genitive (Buttmann, 319 (273)), before, in the sight of, in the presence of, one (so in Greek writings from Homer down; the Sept. often for לִפנְיֵ and בְּעֵינֵי also for לְעֵינֵי): Mark 2:12 (T Tr marginal reading WH ἔμπροσθεν); Luke 20:26; Acts 7:10 (ἐναντίον Φαραώ, when he stood before Pharaoh (here Tdf. ἔναντι, which see)); Acts 8:32; Hebraistically, in the judgment, estimation, of one, Luke 24:19; (Luke 1:6 T Tr WH) (Genesis 10:9, etc.). (τό ἐναντίον i. e. τοὐναντίον see in its place.)