Abbott-Smith Manual Greek Lexicon
ὑπο-δείκνυμι (G5263)
10 ὑπο-δείκνυμι [in LXX for נָגַד hi., etc. ;] to show secretly . to show by tracing out ; hence, generally, to teach, make known : c. dat. pers., Lk 6:47 12:5 , Ac 9:16 ; id. c. inf., Mt 3:7 , Lk 3:7 ; seq., ὅτι , Ac 20:35 .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain