Synonyms of slip away

Verb

1. slip away, steal away, sneak away, sneak off, sneak out, leave, go forth, go away

usage: leave furtively and stealthily; "The lecture was boring and many students slipped out when the instructor turned towards the blackboard"

2. elapse, lapse, pass, slip by, glide by, slip away, go by, slide by, go along, advance, progress, pass on, move on, march on, go on

usage: pass by; "three years elapsed"