yì
thought
Thought (意) is the sound (音) that comes from the mind (心). (Oversimplified for brevity. The 音 component in this character has a complicated history.)
Evolution

Seal script
Shuowen (~100 AD)
Clerical script
Eastern Han dynasty (25-220 AD)Regular script
ModernDefinitions
Component uses
Meaning component in 1 character (0 verified)
Sources
季旭昇《說文新證》p.790-791