5FC5 tất tất Korean: 10 NHSK word(s): 必须* 3 bi4 xu1to have to/ must/ compulsory/ necessarily 不必* 5 bu4 bi4need not/ does not have to 未必* 5 wei4 bi4not necessarily/ maybe not 必然* 5 bi4 ran2inevitable/ certain/ necessity 必需* 5 bi4 xu1to need/ to require/ essential/ indispensable 必要* 5 bi4 yao4necessary/ essential/ indispensable/ required 何必* 5 he2 bi4there is no need/ why should 务必* 6 wu4 bi4must/ to need to/ to be sure to 必定* 6 bi4 ding4be bound to/ be sure to 势必* 6 shi4 bi4is bound to (happen) KOREAN6000 word(s): KOREAN 2500 New HSK words): KOREAN Sentence(s):