G1280
διαπορέω
be perplexed
δι-απορέω, -ῶ [in Sm.: Psa.77:5, Dan.2:1 * ;] to be quite at a loss, be in great perplexity: absol., Act.2:12; before διὰ τό, with inf., Luk.9:7; περί, Act.5:24; ἐν ἑαυτῷ, Act.10:17.† (AS)
The KJV translates G1280 in the following manner:
doubted (4x), perplexed (4x), doubt (2x)
Full Thayer's lexicon entry
διαπορέω — diaporéō
διαπορέω: διαπόρω imperfect διηπόρουν; middle (present infinitive διαπορεῖσθαι (Luk 24:4 R G)); imperfect διηπορουμην (Act 2:12 T Tr WH); in the Greek Bible only in (Dan 2:3 Symm. and) Luke; properly, thoroughly (δ῾ιἀαπορέω (which see), to be entirely at a loss, to be in perplexity: absolutely Act 2:12; followed by διά τό with an infinitive Luk 9:7; περί τίνος, Luk 24:4 (here the middle is to be at a loss with oneself, for which L T Tr WH read the simple ἀπορεῖσθαι); Act 5:24; ἐν ἑαυτῷ followed by indirect discourse, Act 10:17. (Plato, Aristotle, Polybius, Diodorus, Philo, Plutarch, others.)
4 occurrences
Luke (1), Acts (3)