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terrible

In a sentence
To bol strašný týždeň.
It was an awful week.
Čo je to za strašný zvuk?
What's that horrible sound?
To je strašne drahé!
That is very expensive!
Po búrke ostal v uliciach strašný neporiadok.
After the storm, a terrible mess remained in the streets.
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.