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Definition of weaken
weaken
/ˈwiːkən/
weak · en
Adjective:weak
•Past Simple:weakened
•Past Participle:weakened
•Present Participle:weakening
weaken Lexical Profile
CEFR
B1
Grade
4
Tier
2
Usage
Top 5k
Syllables
2
weaken Game Scores & Validity
Scrabble US
Scrabble UK
WWF
Wordle Guess
• verb
1
To make or become less strong in physical power, structural integrity, authority, or effectiveness.
Example
"Years of harsh coastal weather had begun to weaken the old wooden pier."
2
To become less intense, severe, or resolute; to waver in determination or conviction.
Example
"The storm is expected to weaken considerably once it moves inland over the mountains."
3
To decline in market value, exchange rate, or purchasing power (especially of a currency, stock, or economy).
Example
"The national currency continued to weaken against major foreign benchmarks throughout the third quarter."
Synonyms
View all synonyms for weaken Antonyms
View all antonyms for weaken• Rhymes for weaken
Word Origin & Etymology
Formed in Middle English as 'wekenen' from the adjective 'weak' (borrowed from Old Norse 'veikr', meaning 'pliable' or 'yielding') combined with the verbal suffix '-en'.
Cite this Entry
Wordmom. (2026). Definition of Weaken. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/weaken