From English - German Ding/FreeDict dictionary ver. 1.9-fd1:
nagged /nˈaɡd/
gemeckert, gemault, gemäkelt, gemotzt, genörgelt, gemosert, gematschkert, geschnorrt
Synonyms: grumbled, groused, grouched, gripped, moaned, bitched, crabbed, kvetched
see: grumble, grouse, grouch, gripe, moan, nag, bitch, crab, kvetch, grumbling, grousing, grouching, gripping, moaning, nagging, bitching, crabbing, kvetching