gāi

should

Phonosemantic compound. represents the meaning and represents the sound.

Components
言 meaning component

  Meaning component

yán

  

speech

亥 sound component

  Sound component

hài

  

12th terrestrial branch

Evolution

該 Seal script Shuowen (~100 AD)

Seal script

Shuowen (~100 AD)
該 Clerical script Eastern Han dynasty (25-220 AD)

Clerical script

Eastern Han dynasty (25-220 AD)
該 Clerical script Eastern Han dynasty (25-220 AD)

Clerical script

Eastern Han dynasty (25-220 AD)
該 Clerical script Eastern Han dynasty (25-220 AD)

Clerical script

Eastern Han dynasty (25-220 AD)
該 Regular script Modern

Regular script

Modern
Definitions

() 

gāi

should, ought to, need to; should; ought to; probably; must be; to deserve; to owe; to be sb's turn to do sth; that; the above-mentioned

Most common words with 該
Freq.
Word
Meaning

should

应该

ought to

该死

Damn it!

不该

should not

活该

ought