to immerse in water or sprinkle or pour water on in the Christian rite of baptism

They baptized the new baby.

to cleanse spiritually; initiate or dedicate by purifying.

to give a name to at baptism; christen.

to administer baptism.

verb

admit , asperse , besprinkle , call , christen , cleanse , denominate , dip , dub , entitle , immerse , name , purify , regenerate , sprinkle , term , title , designate , style , full