slip
— Verb
– English
~ insert inconspicuously or quickly or quietly; "He slipped some money into the waiter's hand"
slip
— Verb
– English
~ move stealthily; "The ship slipped away in the darkness"
slip
— Verb
– English
~ pass on stealthily; "He slipped me the key when nobody was looking"
slip by
— Verb
– English
~ pass by; "three years elapsed"
slip away
— Verb
– English
~ leave furtively and stealthily; "The lecture was boring and many students slipped out when the instructor turned towards the blackboard"