Greek word
báptō
βάπτω
What it means
to whelm, i.e. cover wholly with a fluid
to whelm, i.e. cover wholly with a fluid; in the New Testament only in a qualified or special sense, i.e. (literally) to moisten (a part of one's person), or (by implication) to stain (as with dye)
Where it comes from
a primary verb