聾する[rousuru] to deafen
聾唖[roua] deafness
聾唖学校[rouagakkou] school for the deaf
聾唖者[rouasha] deaf and mute person

聾学校[rougakkou] school for the deaf
聾桟敷[tsunbosajiki] being kept uninformed
聾者[rousha] deaf person
鉄聾[kanatsunbo] completely deaf

劈く[tsunzaku] to break
劈開[hekikai] cleavage (in gems)
劈頭[hekitou] outset

開巻劈頭[kaikanhekitou] at the very beginning of a book
劈頭第一[hekitoudaiichi] at the outset