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fatal
In a sentence
To môže mať smrteľné následky.
This may have lethal consequences.
Smrteľní nepriatelia sú nesmrteľní priatelia.
Mortal enemies are immortal friends.
Úraz mohol mať smrteľné následky.
The accident could have had fatal consequences.
Lekári bojovali so smrteľnou infekciou.
Doctors fought a deadly infection.
Examples from Tatoeba (CC BY 2.0 FR).
Source
Slovak National Corpus (SNK) ↗English gloss from the frequency publish path. Includes Tatoeba example sentences when present.
Full attribution on References.