## Examples
- Regular exercise will strengthen your muscles.
- The wind strengthened as the storm moved closer.
- New data strengthened their case for the policy change.

## Synonyms
- anneal
- brace
- confirm
- enstrengthen
- fortify
- harden
- indurate
- intend
- invigorate
- munite
- nerve
- reinforce

## Antonyms
- atrophy
- debilitate
- enervate
- enfeeble
- weaken

## Derived Forms
- enstrengthen
- instrengthen
- nonstrengthened
- prestrengthen
- restrengthen
- strengthenable
- strengthener
- strengtheningly
- unstrengthened
- unstrengthening

## Related Forms
- augment

## Roots and Affixes
- Root: strengthenen
- Affix: -en - to make

## Etymology
From rare Middle English strengthenen (14th c.), from earlier strengthen (12th c.), where -en is the infinitive ending. Probably the original form was reinterpreted as strength + -en around the time when the infinitive ending was being apocopated in late Middle English.

## AI Etymology
Strengthen is from rare Middle English strengthenen (14th c.), from earlier strengthen (12th c.), where -en is the infinitive ending. Probably the original form was reinterpreted as strength + -en around the time when the infinitive ending was being apocopated in late Middle English. In present-day use, it can mean to make something stronger or more powerful, or to become stronger.

## Topics
- Cause, Change & Process
- Actions & Processes

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