Strong's G770 — ἀσθενέω (verb)
astheneo (as-then-eh'-o) v.
1. to be feeble (in any sense)
[from G772]
KJV: be diseased, impotent folk (man), (be) sick, (be, be made) weak 
Root(s): G772 
Hebrew root: ἀσθενής
Occurrences: 33