卧
+
卧底
Simplified
卧底
Traditional
臥底
Pinyin
wò dǐ
Definition
to hide (as an undercover agent); an insider (in a gang of thieves); a mole
他是个卧底，别说话
Tā shì gè wòdǐ, bié shuōhuà
He's an undercover agent, don't speak
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You might also see
底
dǐ
bottom; base; background; foundation; copy (of a manuscript or receipt etc.) kept as a record; (suffix) end of a year or month; (math.) radix; base (abbr. for 底数)
HSK4
底线
dǐ xiàn
bottom line; the limit of what one is prepared to accept; (sports) baseline; (sewing) under thread; spy; informer; plant
垫底
diàn dǐ
to put sth on the bottom; to eat sth to tide oneself over until mealtime; to lay the foundation; to come last in the rankings
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