to be electrocuted

electrocution (accidental death or suicide by electric shock)

karoshi, death from overwork

to die a lonely death, die alone

kodokushi, lonely death

pretending not to witness something

聾, 耳癈: (archaic, possibly obsolete) deafness, deaf / 聾, 耳癈: (archaic, possibly obsolete) a deaf person

listening ear; attentive ear

耳朶: earlobe

耳切り: the practice of cutting off an ear as punishment