lǜ
be concerned
Simplified form of 慮. Phonosemantic compound. 思 represents the meaning and 虍 represents the sound.
Components
Evolution

Bronze script
Late Warring States (~250 BC)
Seal script
Shuowen (~100 AD)
Clerical script
Western Jin dynasty (266-316 AD)Traditional script
ModernSimplified script
ModernSources