Which to use
“constrain” and “constrained” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #36,089
- “constrain” frequency rank
- #16,871
- “constrained” frequency rank
- 52960
- confusion score
Side-by-Side Comparison
| Feature | constrain | constrained |
|---|---|---|
| Definition | To force physically, by strong persuasion or pressuring; to compel; to oblige. | simple past and past participle of constrain |
Where the eye mixes constrain and constrained
Muted = shared; highlighted = the visual trap. They share 9 letters in sequence.
Why the eye confuses constrain with constrained
A purely visual mix-up. constrain (/kənˈstɹeɪn/) and constrained (/kənˈstɹeɪnd/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 2 extra letter(s) - “constrain” sits inside “constrained”. Our composite confusion score for this pair is 52960, derived from the frequency rank of both members and their visual similarity.
constrain is recorded at frequency rank #36,089, classified as averb, pronounced /kənˈstɹeɪn/. constrained is at rank #16,871, tagged as averb, pronounced /kənˈstɹeɪnd/.
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 52960, this pair ranks #152,815 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of constrain vs constrained
Shared letters: acinorst. Private to "constrain": -. Private to "constrained": de.
"constrain" · 9 letters · shape CVCCCCVVC · "constrained" · 11 letters · shape CVCCCCVVCVC
Known mistypes of this pair
- constrain ← cconstrain · cnostrain · connstrain · consrtain · consstrain · constarin · constrainn · constrani
- constrained ← cconstrained · cnostrained · connstrained · consrtained · consstrained · constarined · constraiend · constrainde
Frequently Asked Questions
Do "constrain" and "constrained" mean the same thing in a sentence?
Which is more common, "constrain" or "constrained"?
After this comparison
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "constrain" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "constrained" - compare definitions side by side with the headword page. Word entry
- This pair ranks #152,815 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "constrain" and "constrained" also get mixed up with nearby pairs, the highest-scored neighbour is "constrain vs constraint". Nearby pair
- Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes
Confusion rank #152,815 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.