(wilt) v.i.
1. To lose freshness; droop or become limp, as a flower that has been cut or that has not been watered.
2. To lose energy and vitality; become faint or languid: We wilted under the hot sun.
3. To lose courage or spirit; subside suddenly.
—v.t.
4. To cause to droop or wither.
5. To cause to lose vitality and energy.
—noun
1. The act of wilting; also, languor; faintness.
2. An infectious and virulent disease sometimes epidemic among certain caterpillars and insect larvae, which are reduced to a liquefied mass by its ravages: also wilt disease. [Prob. dial. var. of obs. welk wither. Cf. MDu. welken wither.]

(wilt)
Archaic second person singular, present tense of WILL², used with thou.