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mysterious

In a sentence
V pyramíde bola objavená záhadná miestnosť.
A mysterious chamber has been discovered inside the pyramid.
Tom záhadne zmizol.
Tom mysteriously disappeared.
Záhadný zvuk v noci všetkých zobudil.
A mysterious sound at night woke everyone.
Záhadná mapa viedla k starej studni.
The enigmatic map led to an old well.
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.