fatal — OAT · Shobdo

fatal

adjective

1 a fatal disease:

deadly, lethal, mortal, causing death, death dealing, killing;

final, terminal, incurable, untreatable, inoperable, malignant;

tragic;

literary deathly;

archaic baneful.

▷antonyms harmless; superficial.

2 don't make the fatal mistake of assuming others think as you do:

disastrous, devastating, ruinous, catastrophic, calamitous, cataclysmic, destructive, grievous, dire, crippling, crushing, injurious, harmful, costly;

literary direful.

▷antonyms harmless; beneficial.