Extended Strong's Greek Lexicon (Abbott-Smith based)
be an opponent
Usage: ἀντί-κειμαι [in LXX for אָיַב, צוּר, שָׂטַן, etc. ;] __1. to lie opposite to. __2. to oppose, withstand, resist: with dative, Luk.13:17 21:15, Gal.5:17, 1Ti.1:10; as participial subst. (ὁ) ἀντικείμενος, 1Co.16:9, Php.1:28, 2Th.2:4, 1Ti.5:14 (Cremer, 746).† (AS)