FROM STRONG’S GREEK DICTIONARY (1890)

Strong’s Greek Dictionary (1890) — public domain, printed whole.

baptizo βαπτίζω — bap-tid'-zo — from a derivative of 911; to immerse, submerge; to make whelmed (i.e. fully wet); used only (in the New Testament) of ceremonial ablution, especially (technically) of the ordinance of Christian baptism:--Baptist, baptize, wash.

see GREEK for 911