pełen grozy in English:

the eerie sound of an owl hooting at night

"There was an eerie resemblance between them."

eerie silence

an eerie sixth sense guided him to

After a moment of eerie silence, the storm hit.

The obligator smiled; he likely meant it to be disarming but Tresting only found it eerie.

The empty house filled with an eerie melody

- Let´s try to summon some ghosts on Halloween! - Oh my God. No, it´s eerie!

- How about a walk in the graveyard by night? - Your date ideas are eerie...