tuō
trust, rely on
Phonosemantic compound. 言 represents the meaning and 乇 represents the sound.
Evolution

Bronze script
Early Warring States (~400 BC)
Seal script
Shuowen (~100 AD)
Clerical script
Western Han dynasty (202 BC-9 AD)
Clerical script
Western Jin dynasty (266-316 AD)Regular script
ModernDefinitions
Sources