I was looking for a Klingon word for "curiosity" but I was unable to find one. In the dictionary, there are words for scientist (tej), science (QeD), research (Qul), analysis (poj), smart ('ong/vai), interesting (Daj), etc. But nothing reproducing exactly "curiosity". 

I haven't checked the *Star Trek: Discovery* subtitles in Klingon yet.