slip into

to gradually enter a deep state of unconsciousness, usually due to illness or injury

to lose consciousness gradually

to move into a position where you cannot be seen or noticed

to become less noticeable or important in a situation

to be forgotten or to stop being famous or important

to enter a place quietly or quickly so as not to be noticed

to gradually fall into a light sleep

to put something into a container easily and quickly

to gradually start to owe money

used for an economy that is beginning a period of reduced activity

used for a country or company whose spending exceeds its income

to engage a mechanism, often used for vehicles; also metaphorically for starting to work effectively