Apparently a primary verb; properly, to toil, i.e. (by implication) to tire (figuratively, faint, sicken) -- faint, sick, be wearied.
1. to grow weary, be weary (so from Homer down): Revelation 2:3 Rec.; Hebrews 12:3.
2. to be sick: James 5:15 (Sophocles (Herodotus), Aristophanes, Euripides, Xenophon, Plato, Aristotle, Diodorus, Lucian, others).