Here is a list of irregular verbs beginning with U.
Base Form | Past Form | Past Participle |
unbend | unbent | unbent |
underbid | underbid | underbid |
undercut | undercut | undercut |
underdo | underdid | underdone |
underfeed | underfed | underfed |
undergo | underwent | undergone |
underlie | underlay | underlain |
underpay | underpaid | underpaid |
undersell | undersold | undersold |
underspend | underspent | underspent |
understand | understood | understood |
undertake | undertook | undertaken |
underwrite | underwrote | underwritten |
undo | undid | undone |
unlearn | unlearnt | unlearnt |
unlearned | unlearned |
unmake | unmade | unmade |
unsay | unsaid | unsaid |
unwind | unwound | unwound |
uphold | upheld | upheld |
upset | upset | upset |