To close up or block an opening or gap; to plug, fill, or cover so that passage or flow is stopped.
庭の水たまりにできた穴を土で塞げる作業をした。
We filled the hole in the puddle in the garden with dirt to close it up.
雨が入らないように窓の隙間を板で塞げるようにした。
I fixed the window gaps with boards so rain wouldn't get in.
排水口を布で塞げると水の流れが止まった。
When the drain was plugged with cloth, the water stopped flowing.