Dictionary entry

ἀποτάσσω

G. Abbott-Smith's A Manual Greek Lexicon of the New Testament with Strong's

ἀπο-τάσσω,

[in LXX: Ec 2:20 (יאשׁ pi.), I Es 6:27, Je 20:2, I Mac₄*;]

to set apart. Mid., in late Gk. (Bl., § 37, 1; Swete, Mk., 136 f.; MM, s.v.), c. dat.,

(a) to take leave of: Mk 6:46, Lk 9:61, Ac 18:18, 21, II Co 2:13;

(b) to forsake: Lk 14:33.†