I’ve been overwhelmed and underwhelmed, but I wondered this morning if I had (or could) be whelmed. Turns out I can (and have):

Merriam-Webster

to turn (as a dish or vessel) upside down usually to cover something : cover or engulf completely with usually disastrous effect

Dictionary.com

To cover with water; submerge.

If you found this post interesting/useful, see my previous deconstructions of the words stick-to-itiveness and gruntled.