Which to use
“underlie” and “undermine” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #42,970
- “underlie” frequency rank
- #12,161
- “undermine” frequency rank
- 55131
- confusion score
Side-by-Side Comparison
| Feature | underlie | undermine |
|---|---|---|
| Definition | To lie in a position directly beneath something. | To dig underneath (something), to make a passage for destructive or military purposes; to sap. |
Where the spellings diverge
Shared letters are muted; the letters that actually set underlie and undermine apart are highlighted. They share 7 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
A purely visual mix-up. underlie (/ˌʌn.dəˈlaɪ/) and undermine (/ˌʌn.dəˈmaɪn/) 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 1 letter(s) in length. Our composite confusion score for this pair is 55131, derived from the frequency rank of both members and their visual similarity.
underlie is recorded at frequency rank #42,970, classified as averb, pronounced /ˌʌn.dəˈlaɪ/. undermine is at rank #12,161, tagged as averb, pronounced /ˌʌn.dəˈmaɪn/.
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 55131, this pair ranks #135,974 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of underlie vs undermine
Shared letters: deinru. Private to "underlie": l. Private to "undermine": m.
"underlie" · 8 letters · shape VCCVCCVV · "undermine" · 9 letters · shape VCCVCCVCV
Known mistypes of this pair
Frequency comparison
Frequently Asked Questions
Can "underlie" and "undermine" be used interchangeably?
Which is more common, "underlie" or "undermine"?
Remembering underlie vs undermine
The fastest way to pick the right one every time.
- Read both glosses above and match the meaning you intend, only context separates this pair.
- See each word in full, definition, IPA, etymology and its other confusables. Full “underlie” entry
- Browse more pairs most likely to be confused. Most confusable