The past tense of underguesstimate is underguesstimated. See all forms of underguesstimate with easy examples.
The past tense of underguess is underguessed. See all forms of underguess with easy examples.
The past tense of undergrub is undergrubbed. See all forms of undergrub with easy examples.
The past tense of undergrow is undergrew. See all forms of undergrow with easy examples.
The past tense of underground is undergrounded. See all forms of underground with easy examples.
The past tense of undergoe is underwent. See all forms of undergoe with easy examples.
The past tense of undergo is underwent. See all forms of undergo with easy examples.
The past tense of undergird is undergirded. See all forms of undergird with easy examples.
The past tense of underget is undergot. See all forms of underget with easy examples.
The past tense of undergeneralize is undergeneralized. See all forms of undergeneralize with easy examples.