ἠσθένησα [3 verses](verb 1st sg aor ind act) "Sick" is from astheneo, which means "to be weak," "to be feeble," and "to be sickly."  - Surprisingly, the word used for "sick" is also an uncommon one despite all of Christ's work healing, he only uses it once before. It means "to be weak or sickly."