fill in
To fill; to replace material that is absent or has been removed.
After you're done laying the pipe, fill in the trench.
ADV
fast, quickly, rapidly
The bathtub filled quickly when we turned on the hot water tap.
gradually, slowly | up
VERB + FILL
begin to
When the wind picked up, the balloon began to fill with hot air.
seem to
The new employee seemed to fill the leadership gap that the company had struggled with for months.
PREP
with
She filled her backpack with books and notebooks before heading to school.
PHRASES
be filled to capacity
The concert venue was filled to capacity, so they turned away late arrivals at the door.
be filled to the brim (with sth)
Her backpack was filled to the brim with books and notebooks for the school trip.