Abbott-Smith Manual Greek Lexicon
δι-απορέω (G1280)
4 ** δι-απορέω , -ῶ [in Sm.: Ps 76(77):5 , Da 2:1 * ;] to be quite at a loss, be in great perplexity : absol., Ac 2:12 ; seq. διὰ τό , c. inf., Lk 9:7 ; περί , Ac 5:24 ; ἐν ἑαυτῷ , Ac 10:17 .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain