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In a sentence
Tento vysávač je príšerne hlučný.
This vacuum cleaner is awfully loud.
Vyzerá to príšerne.
It looks hideous.
V noci je tu príšerne hlučno.
It's awfully noisy at night around here.
Examples from Tatoeba (CC BY 2.0 FR).
Source
Slovak National Corpus (SNK) ↗English gloss from the frequency publish path. Example sentences from Tatoeba (CC BY 2.0 FR).
Full attribution on References.