From eis; inside (as preposition or adjective) -- (with-)in(-ner, -to, -ward).
see GREEK eis
1. to within, into: Matthew 26:58; Mark 14:54; with the genitive Mark 15:16 (Winer's Grammar, § 54,6).
2. within: John 20:26; Acts 5:23; ὁ ἔσω ἄνθρωπος, the internal, inner man, i. e. the soul, conscience (see ἄνθρωπος, 1 e.), 2 Corinthians 4:16 L T Tr WH; Romans 7:22; Ephesians 3:16; οἱ ἔσω, those who belong to the Christian brotherhood (opposed to οἱ ἔξω (which see in ἔξω, 1 a.)), 1 Corinthians 5:12.