yā, yà
press, push down
Simplified form of 壓. Phonosemantic compound. 土 represents the meaning and 厌 represents the sound.
Components
厌 Sound Simplified component
yàn
dislike
Evolution

Seal script
Shuowen (~100 AD)
Clerical script
Xin dynasty (9-23 AD)Traditional script
ModernSimplified script
ModernDefinitions
Sources