weaken, enfeeble, debilitate, undermine, sap, disable mean to lose or cause to lose strength or vigor. weaken may imply loss of physical strength, health, soundness, or stability or of quality, intensity, or …

Definition of weaken verb from the Oxford Advanced Learner's Dictionary. [transitive, intransitive] weaken (somebody/something) to make somebody/something less strong or powerful; to become …

Considered state-of-the-art when it was built in 1932, the bridge has been suffering from a chemical reaction that for decades has weakened its concrete.

WEAKEN definition: to make weak or weaker. See examples of weaken used in a sentence.

If you weaken something or if it weakens, it becomes less strong or less powerful. The recession has weakened many businesses.

To make or become weak or weaker. weak′en·er n. American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. …

to (cause to) become weak or weaker: [no object] The animal weakened and eventually died. [~ + object] A lack of resources will weaken our efforts. weak•en•er, n. [countable]

Jan 18, 2026 · weaken (third-person singular simple present weakens, present participle weakening, simple past and past participle weakened) (transitive) To make weaker or less strong.

To weaken is to become less powerful or strong. When a storm weakens, the wind dies down and the torrential rain becomes a light drizzle.

To reduce or diminish the strength, power, or effectiveness of something. "The storm's powerful winds began to weaken as it moved further inland." It implies a process of gradual or intentional loss or …