How to say "mortality" in Japanese

• 死亡しぼうJLPT N3approx.Common
  noun, suru verb, intransitive verbThe everyday word for death or dying; it covers mortality in medical, statistical, and epidemiological contexts, as in mortality rates and cause-of-death reporting. Neutral and factual in tone.
  我々われわれは彼かれの死亡しぼうのニュースにショックを受うけた。↗

  We were shocked at the news of his death.
• 必滅ひつめつ
  noun, suru verb, intransitive verbA less common word meaning mortality in the sense that all living things must eventually die. Suited to philosophical or religious discussion of human impermanence rather than to medical or statistical usage.

Use 死亡 for death or dying, including mortality in medical or statistical contexts; 必滅 expresses mortality in the philosophical sense of being fated to die and is much less common.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 死亡しぼうdeath
• 必滅ひつめつmortality