From a compound of epi and demos; to make oneself at home, i.e. (by extension) to reside (in a foreign country) -- (be) dwelling (which were) there, stranger.
see GREEK epi
see GREEK demos
1. to be present among one's people, in one's city or in one's native loud (cf. ἐπί D. 1) (Thucydides, Plato, others; opposed to ἀποδήμειν, Xenophon, Cyril 7, 5, 69; ἐπιδήμειν ἐν τῷ δέ τῷ βίῳ, Theophilus ad Autol. 2, 12 (p. 88, Otto edition)).
2. to be a sojourner, a foreign resident, among any people, in any country: Acts 2:10; οἱ ἐπιδημοῦντες ξένοι, Acts 17:21; (Xenophon, Plato, Theophrastus, Lucian, Aelian, others).