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Underturn
- To turn upside down; to subvert; to upset.
Underverse
- The lower or second verse.
Underwhelm
- To interest less than anticipated; to be dull to (a person).
Underwhelming
- Less interesting than expected; dull.
Underwitted
- Weak in intellect; half-witted; silly.
Underwork
- To injure by working secretly; to destroy or overthrow by clandestine measure; to undermine.