1. whelm - Noun
2. whelm - Verb
To cover with water or other fluid; to cover by immersion in something that envelops on all sides; to overwhelm; to ingulf.
Fig.: To cover completely, as if with water; to immerse; to overcome; as, to whelm one in sorrows.
To throw (something) over a thing so as to cover it.
Source: Webster's dictionary