sneak in

English Thesaurus

1. insert casually (verb.communication)

hypernym	:	add, append, supply,
definition	:	state or say further (verb.communication)

hyponym	:	spatchcock,
definition	:	interpolate or insert (words) into a sentence or story (verb.creation)

2. enter surreptitiously (verb.contact)

hypernym	:	penetrate, perforate,
definition	:	pass into or through, often by overcoming resistance (verb.contact)