Impotent - Vine's Expository Dictionary of New Testament Words
Impotent
[ A-1,Adjective,G102, adunatos ]See IMPOSSIBLE, A, No. 1.
[ A-2,Adjective,G772, asthenes ]
without strength" (a, negative, sthenos, strength), is translated "impotent" in Acts 4:9. See FEEBLE, SICK, WEAK.
[ B-1,Verb,G770, astheneo ]
"to be without strength" (akin to A, No. 2), is translated "impotent folk" in John 5:3, AV; cp. John 5:7 (the present participle, lit., "being impotent"). See DISEASED, SICK, WEAK.