intrude vs intrude on

intrude and intrude on both are verbs.

Word	Noun	Adjective	Verb	Adverb
intrude	No	No	Yes	No
intrude on	No	No	Yes	No

intrude (verb)	intrude on (verb)
thrust oneself in as if by force	to intrude upon, infringe, encroach on, violate
enter uninvited
search or inquire in a meddlesome way
enter unlawfully on someone's property