御握り[onigiri] rice ball (often triangular, sometimes with a filling and wrapped in nori)
握らす[nigirasu] to let (someone) take hold of your hand
握り[nigiri] grasping
握り屋[nigiriya] miser
握りずし[nigirizushi] nigirizushi

握り潰し[nigiritsubushi] shelving
握りしめる[nigirishimeru] to grasp tightly
握る[nigiru] to clasp
握手[akushu] handshake
握斧[akufu] hand-axe

握り潰し[nigiritsubushi] shelving
胃潰瘍[ikaiyou] stomach ulcer
圧潰す[oshitsubusu] to squash
暇潰し[himatsubushi] waste of time
潰滅[kaimetsu] destruction

潰乱[kairan] corruption (of order, customs, etc.)
丸潰れ[marutsubure] complete ruin
顔を潰す[kaowotsubusu] to make somebody lose face
泣潰す[nakitsubusu] to cry one's eyes out
乗り潰す[noritsubusu] to ride (a horse) to death