阻塞

阻塞	zǔ sè	to block / to clog
阻	zǔ	to hinder / to block / to obstruct
塞	sāi	to plug; to stop up; to stuff in / (bound form) a stopper; a cork
塞	sài	(bound form) strategic stronghold
塞	sè	(bound form) to block; to obstruct