slip away
• depart without saying goodbye; leave quietly or surreptitiously.
• "I slipped away from the guided tour"
• (of time) pass; elapse.
• "the night was slipping away"
Similar:
pass,
elapse,
go by/past,
roll by/past,
glide by/past,
slide by/past,
fly by/past,
steal by/past,
tick by/past,
wear on,
