A — 1: ἴδιος
(Strong's #2398 — Adjective — idios — id'-ee-os )

one's own, is translated "private" in 2—Peter 1:20 (see under INTERPRETATION). See BUSINESS , B.

B — 1: κατά
(Strong's #2596 2398 — Preposition — kat' idian — kat-ah' )

is translated "privately" in Matthew 24:3; Mark 4:34 , RV (AV, "when they were alone"); Mark 6:32 (AV only); 7:33, RV; Mark 9:28; 13:3; Luke 10:23; Acts 23:19; Galatians 2:2 . Contrast Galatians 2:14 .