HSK4
mì, bì
secret, mysterious
Phonosemantic compound. 礻 represents the meaning and 必 represents the sound. Originally written as 祕. The 礻 component was later corrupted to 禾.
禾 Simplified component
hé
grain stalk
Corruption of the 礻 component in the original character 祕.
必 Sound component
bì
surely
秘
mì
secret, mysterious, abstruse; secret; secretary
see 秘魯|秘鲁[Bìlǔ]
秘 (祕)
variant of 秘[mì]
秘密
secret
神秘
mysterious
秘书
secretary
秘书长
secretary-general
Make Me a Hanzi
Unicode
Dong Chinese
CC-CEDICT
SUBTLEX-CH
MTSU Chinese text computing
李学勤《字源》p.6