Abbott-Smith Manual Greek Lexicon
ῥώννυμι (G4517)
1 ῥώννυμι [in LXX: II Mac 9:20 11:21 , 28 , 33 ; III Mac 6 * ;] to strengthen ; most freq. in pf., ἔρρωμαι , to put forth strength, be strong , hence, often in imperat., ἔρρωσο, ἔρρωσθε , farewell (Lat. vale ): Ac 15:29 23:30 Rec., R, mg.†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain