塞 sāisàisè HSK6 stop up Definitions Defs Origin Strokes Stroke Words Sentences Sents Showing: All "sai4" meanings All meanings 9 sāi 7 stuff 6stopper 1sài 1 stronghold 1sè 1 block 1 1 sentence for 塞 (sài) 这座古城自古以来就是军事要塞。 zhè zuò gǔchéng zìgǔyǐlái jiù shì jūnshì yào sài. This ancient city has been a military fortress since ancient times. Source: Dong Chinese Dictionary