Which to use
“weaken” is a verb and “weaker” is an adjective - they look or sound alike but fill different roles in a sentence.
- #15,305
- “weaken” frequency rank
- #8,503
- “weaker” frequency rank
- 23808
- confusion score
Side-by-Side Comparison
| Feature | weaken | weaker |
|---|---|---|
| Definition | To make weaker or less strong. | comparative form of weak: more weak |
Where the spellings diverge
Shared letters are muted; the letters that actually set weaken and weaker apart are highlighted. They share 5 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
These two trip readers on the page rather than in the ear: weaken is /ˈwikən/ while weaker is /ˈwiːkə/. Spoken aloud the problem disappears. In writing it persists, because they differ by a single letter - n in “weaken” becomes r in “weaker”, and the parts of speech differ too (verb vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 23808, derived from the frequency rank of both members and their visual similarity.
weaken is recorded at frequency rank #15,305, classified as averb, pronounced /ˈwikən/. weaker is at rank #8,503, tagged as anadj, pronounced /ˈwiːkə/.
Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.
With a confusion score of 23808, this pair ranks #406,616 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of weaken vs weaker
Shared letters: aekw. Private to "weaken": n. Private to "weaker": r.
"weaken" · 6 letters · shape CVVCVC · "weaker" · 6 letters · shape CVVCVC
Known mistypes of this pair
Frequency comparison
Frequently Asked Questions
Can "weaken" and "weaker" be used interchangeably?
Which is more common, "weaken" or "weaker"?
Remembering weaken vs weaker
The fastest way to pick the right one every time.
- Check the role first: if you need a verb, it's “weaken”; for an adjective, it's “weaker”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “weaken” entry
- Browse more pairs most likely to be confused. Most confusable