yán
strict
Phonosemantic compound. 喦 represents the meaning and 敢 represents the sound. Based on the original meaning "exaggerate". The meaning later shifted to "extreme", "severe", and "strict".
Evolution

Bronze script
Late Western Zhou (~800 BC)
Seal script
Shuowen (~100 AD)
Clerical script
Eastern Han dynasty (25-220 AD)Regular script
ModernDefinitions
Sources