G1605
ἐκπλήσσω
be astonished
ἐκ-πλήσσω (Attic -ττω, Act.13:12), [in LXX: (pass.) Ecc.7:16, (שָׁמֵם hithp.), Wis.13:4, 2Ma.7:12, 4Ma.8:4 4Mac 17:16 * ;] __1. prop., to strike out, drive away. __2. to strike with panic or shock, to amaze, astonish: pass., Mat.13:54 19:25, Mrk.6:2 7:37 10:26, Luk.2:48; before ἐπί, with dative of thing(s), Mat.7:28 22:33, Mrk.1:22 11:18, Luk.4:32 9:43, Act.13:12.† SYN.: " πτωεῖν G?, to terrify, agitate with fear; τρεμεῖν, to tremble, predominantly physical; φοβεῖν, to fear, "the general term," Thayer; cf. also φρίσσω, to shudder, and see: δειλία δειλία, -ας, ἡ (δειλός), [in LXX for אֵימָה, מְחִתָּה, etc. ;] cowardice, timidity (never in good sense): 2Ti.1:7.† SYN.: φόβος, fear, in general, good or bad; εὐλάβεια (which see), apprehension generally, but chiefly pious fear, "that careful and watchful reverence which pays regard to every circumstance in that with which it has to deal" (cf. Tr., Syn., § x).† (AS)
The KJV translates G1605 in the following manner:
astonished (20x), amazed (6x), were (6x)
Full Thayer's lexicon entry
ἐκπλήσσω — ekplḗssō
ἐκπλήσσω, ἐκπλήττω: passive (present ἐκπλήσσομαι or ἐκπλήττομαι (so R G Mat 13:54; Tr WH Act 13:12)); imperfect ἐξεπλησσομην; 2 aorist ἐξεπλάγην; common in Greek from Homer down; properly, to strike out, expel by a blow, drive out or away; to cast off by a blow, to drive out; commonly, to strike one out of self-possession, to strike with panic, shock, astonish; passive to be struck with astonishment, astonished, amazed; absolutely: Mat 13:54; Mat 19:25; Mar 6:2; Mar 10:26; Luk 2:48; used of the glad amazement of the wondering people, Mar 7:37; ἐπί τῇ διδαχή, Mat 7:28; Mat 22:33; Mar 1:22; Mar 11:18; Luk 4:32; Act 13:12; (ἐπί τῇ μεγαλειότητι, Luk 9:43), (ἐπί τῷ κάλλει, Xenophon, Cyril 1, 4, 27; ἐπί τῇ θεά, Aelian v. h. 12, 41; (Winer's Grammar, § 33, b.); by the Greeks also with simple dative and with accusative of the thing, as Wis 13:4; 2Ma 7:12). (Synonym: see φοβέω, at the end.)
13 occurrences
Matthew (4), Mark (5), Luke (3), Acts (1)