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mortiferous

[mawr-tif-er-uh s]
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adjective
  1. deadly; fatal.
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Origin of mortiferous

1525–35; < Latin mortiferus death-bearing, equivalent to morti- (stem of mors) death + -ferus -ferous
Related formsmor·tif·er·ous·ness, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018