ἴδιος
ídios
id'-ee-os
of uncertain affinity; pertaining to self, i.e. one's own; by implication, private or separate.

KJV translates as: X his acquaintance, when they were alone, apart, aside, due, his (own, proper, several), home, (her, our, thine, your) own (business), private(ly), proper, severally, their (own)