wilt

from The American Heritage® Dictionary of the English Language, 5th Edition.

• intransitive verb To become limp or flaccid; droop.
• intransitive verb To feel or exhibit the effects of fatigue or exhaustion; weaken markedly.
• intransitive verb To cause to droop or lose freshness.
• intransitive verb To deprive of energy or vigor; fatigue or exhaust.
• noun The action of wilting or the state of being wilted.
• noun Any of various plant diseases characterized by slow or rapid collapse of terminal shoots, branches, or entire plants.

from The Century Dictionary.

• To droop or fade, as plants or flowers when cut or plucked; wither.
• To become soft or languid; lose energy, pith, or strength.
• To cause to droop or become languid, as a plant; take the stiffness, strength, or vigor out. of; hence, to render limp and pithless; depress.
• The second person singular present indicative of will.
• noun A disease of plants which causes them to wilt: used only with a qualifying word indicative of the plant affected.

from the GNU version of the Collaborative International Dictionary of English.

• intransitive verb Prov. Eng. & U. S. To begin to wither; to lose freshness and become flaccid, as a plant when exposed when exposed to drought, or to great heat in a dry day, or when separated from its root; to droop;. to wither.
• 2d pers. sing. of will.
• transitive verb Prov. Eng. U. S. To cause to begin to wither; to make flaccid, as a green plant.
• transitive verb Prov. Eng. & U. S. Hence, to cause to languish; to depress or destroy the vigor and energy of.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb archaic Second-person singular present tense of will
• verb intransitive To droop or become limp and flaccid (as a dying leaf or flower).
• verb intransitive To fatigue; to lose strength.
• verb transitive To cause to droop or become limp and flaccid (as a flower).
• verb transitive To cause to fatigue; to exhaust.
• noun The act of wilting or the state of being wilted.
• noun Any of various plant diseases characterized by wilting.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun causing to become limp or drooping
• verb lose strength
• verb become limp
• noun any plant disease characterized by drooping and shriveling; usually caused by parasites attacking the roots