9000000000 bộ bộ 9000 thoái thoái Korean: 5 NHSK word(s): 退* 5 tui4retreat/ to decline/ to move back/ to withdraw 退步* 5 tui4 bu4degenerate/ regress 退休* 5 tui4 xiu1retirement (from work) 衰退* 6 shuai1 tui4to decline/ to fall/ to drop/ to falter/ a decline/ recession (in economics) 撤退* 6 che4 tui4retreat KOREAN6000 word(s): KOREAN 2500 New HSK words): KOREAN Sentence(s):