Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
niggling [ˈnɪglɪŋ] adj (trifling) приди́рчивый/приди́рчив (annoying) навя́зчивый/навя́зчив
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.
niggle [ˈnɪgl]
vt задева́ть (заде́ть*perf)
vi (find fault) придира́ться (придра́ться*perf)
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.