i Register
In some senses, mortiferous is marked as archaic. Watch for register when choosing this word.
mortiferous
/mɔːˈtɪfəɹəs/
adj 2
Definitions
adj
1
Causing spiritual death.
Breton recruits were notorious for suffering from la nostalgie – a mortiferous form of homesickness.
2
Causing physical death; deadly, fatal, lethal.
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