λανθάνω
[in LXX for עָלַם ni., etc. ;]
to escape notice, be hidden (from): Mrk.7:24, Luk.8:47; with accusative of person(s), Act.26:26, 2Pe.3:5 3:8; as in common cl. idiom, before ptcp., ἔλαθον ξενίσαντες, entertained unawares, Heb.13:2 (cf. ἐκ-, ἐπι-λανθάνω).†
(AS)