VERBS
be
remain
The museum doors will remain closed on Mondays for staff training.
keep sth
We kept the windows closed during the storm to stay warm.
ADV
firmly, properly, tightly
The door was properly closed before we left the house for vacation.
completely, fully
The factory gates were completely closed during the holiday week.
almost, nearly
The door was nearly closed when I heard someone calling my name from outside.
half, partially, partly
The shop door was partially closed when we arrived this morning.
officially | permanently, temporarily
PREP
for
The swimming pool will be closed for maintenance next week.
to
The swimming pool was closed to visitors during the renovation work last summer.