ürkütücü

Etymology
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Adjective

 * 1) eerie, creepy

Usage notes
Often used in the word-combination (tüyler ürpertici) to refer to something utterly creepy, i.e. literally make (one's) hair stand on end, and not to be confused with (tüylerim ürperdi), i.e. (gave me the goosebumps) in a positive sense.