不 no, not / un- / negative prefix 言 words, speech / speak, say 而 and / and then / and yet / but 喻 metaphor, analogy / example / like Hsk Characters: HSK -Characters and beyond:
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Korean: 1 NHSK word(s): 不言而喻* 6 bu4 yan2 er2 yu4it goes without saying/ it is self-evident KOREAN6000 word(s): 0 KOREAN 2500 New HSK words): 0 KOREAN Sentence(s):