swear off vs swear

swear off and swear both are verbs.

Word	Noun	Adjective	Verb	Adverb
swear off	No	No	Yes	No
swear	No	No	Yes	No

swear off (verb)	swear (verb)
promise to abstain from	have faith or confidence in
	make a deposition; declare under oath
	utter obscenities or profanities
	promise solemnly; take an oath
	to declare or affirm solemnly and formally as true