Which to use
“darken” is a verb and “darkly” is an adverb - they look or sound alike but fill different roles in a sentence.
- #33,602
- “darken” frequency rank
- #29,989
- “darkly” frequency rank
- 63591
- confusion score
Side-by-Side Comparison
| Feature | darken | darkly |
|---|---|---|
| Definition | To make dark or darker by reducing light. | With insufficient light for easy discernment or comprehension. |
Where the eye mixes darken and darkly
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence. darken (CVCCVC) and darkly (CVCCCV) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.
Look-alike desk: darken vs darkly
These two trip readers on the page rather than in the ear: darken is /ˈdɑɹkən/ while darkly is /ˈdɑːkli/. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (verb vs adverb), which is usually the fastest check. Our composite confusion score for this pair is 63591, derived from the frequency rank of both members and their visual similarity.
darken is recorded at frequency rank #33,602, classified as averb, pronounced /ˈdɑɹkən/. darkly is at rank #29,989, tagged as anadv, pronounced /ˈdɑːkli/.
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 63591, this pair ranks #82,122 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of darken vs darkly
Shared letters: adkr. Private to "darken": en. Private to "darkly": ly.
"darken" · 6 letters · shape CVCCVC · "darkly" · 6 letters · shape CVCCCV
Known mistypes of this pair
Frequently Asked Questions
Is swapping "darken" for "darkly" ever safe?
Which is more common, "darken" or "darkly"?
Useful next steps
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "darken" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "darkly" - compare definitions side by side with the headword page. Word entry
- This pair ranks #82,122 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "darken" and "darkly" also get mixed up with nearby pairs, the highest-scored neighbour is "darken vs Darrin". 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 #82,122 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.