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Valid :: Valid (a.) Having sufficient strength or force; founded in truth; capable of being justified, defended, or supported; not weak or defective; sound; good; efficacious; as, a valid argument; a valid objection..

Break :: Break (v. i.) To become weakened in constitution or faculties; to lose health or strength.

Asthenopia :: Asthenopia (n.) Weakness of sight.

Wish-wash :: Wish-wash (n.) Any weak, thin drink..

Imbecile :: Imbecile (v. t.) To weaken; to make imbecile; as, to imbecile men's courage..

Lactone :: Lactone (n.) One of a series of organic compounds, regarded as anhydrides of certain hydroxy acids. In general, they are colorless liquids, having a weak aromatic odor. They are so called because the typical lactone is derived from lactic acid..

Labefaction :: Labefaction (n.) The act of labefying or making weak; the state of being weakened; decay; ruin.

Size :: Size (v. i.) A thin, weak glue used in various trades, as in painting, bookbinding, paper making, etc..

Tweag :: Tweag (v. t.) To tweak.

Atony :: Atony (n.) Want of tone; weakness of the system, or of any organ, especially of such as are contractile..

Shallow-brained :: Shallow-brained (a.) Weak in intellect; foolish; empty-headed.

Protection :: Protection (n.) The act of protecting, or the state of being protected; preservation from loss, injury, or annoyance; defense; shelter; as, the weak need protection..

Strong :: Strong (superl.) Pertaining to, or designating, a verb which forms its preterit (imperfect) by a variation in the root vowel, and the past participle (usually) by the addition of -en (with or without a change of the root vowel); as in the verbs strive, strove, striven; break, broke, broken; drink, drank, drunk. Opposed to weak, or regular. See Weak..

Infirm :: Infirm (v. t.) To weaken; to enfeeble.

Valetudinarian :: Valetudinarian (n.) A person of a weak or sickly constitution; one who is seeking to recover health.

Tremor :: Tremor (v.) A trembling; a shivering or shaking; a quivering or vibratory motion; as, the tremor of a person who is weak, infirm, or old..

Weak :: Weak (v. i.) Not able to resist external force or onset; easily subdued or overcome; as, a weak barrier; as, a weak fortress..

Invalidate :: Invalidate (v. t.) To render invalid; to weaken or lessen the force of; to destroy the authority of; to render of no force or effect; to overthrow; as, to invalidate an agreement or argument..

Weaken :: Weaken (v. t.) To make weak; to lessen the strength of; to deprive of strength; to debilitate; to enfeeble; to enervate; as, to weaken the body or the mind; to weaken the hands of a magistrate; to weaken the force of an objection or an argument..

Weak :: Weak (v. i.) Pertaining to, or designating, a noun in Anglo-Saxon, etc., the stem of which ends in -n. See Strong, 19 (b)..

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