overwhelming很常见。underwhelm和whelm也都是词。whelm和bury, cover, engulf和submerge是近义词。

这些都是词：overdone underdone overestimate underestimate overgrowth undergrowth overlay underlay overlie underlie overpay underpay overpass underpass overrate underrate overshoot undershoot oversize undersize overstate understate overtake undertake