English Reference
verb

weaken

v.
US /ˈwikən/ UK /wˈiːkən/ weak·en UK spelling weakens

  1. 01 B2 Upper Intermediate

    to make someone or something lose their strength, power, or health.

    to reduce the strength, power, or intensity of something. Transitive — takes a direct object.

    Simple

    The long illness started to weaken his muscles over several months.

    In context

    The constant scandals began to weaken the public's trust in the government's ability to lead effectively.

  2. 02 B2 Upper Intermediate

    to lose your own strength, power, or determination.

    to become less strong, powerful, or determined. Intransitive — does not take a direct object.

    Simple

    Her resolve began to weaken as the cold weather got worse.

    In context

    As the storm moved inland, the winds started to weaken, eventually dropping below hurricane force.

    fadeflagwane

Ozempic-like drugs appear to weaken more than hunger—they may also reduce cravings for alcohol and other addictive substances.

ScienceDaily· 12 Aug 2026

And the same heat that drives the demand also weakens the supply: gas turbines lose output as the air warms, and in June several UK plants had to be turned down.

BBC News· 29 Jul 2026

From weak + -en.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Level C1 · Advanced
Frequency Frequent
Updated