Abbott-Smith Manual Greek Lexicon
ἔν-τρομος (G1790)
3 † ἔν-τρομος , -ον [in LXX: Da TH 10:11 ( רָעַד hi.); ἔ. γίγνεσθαι , Ps 17 (18):7 76 (77):18 ( רַעַשׁ ), Wi 17:10 , I Mac 13:2 * ;] trembling with fear (Pint.): Ac 7:32 16:29 , He 12:21 ( ἔκτρ- , WH, mg.).†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain