cavilinggerund / present participle Used as an adjective derived from the present participle of the verb "cavil".
The caviling customer found fault with every little detail of the service.
Придирчивый клиент находил недостатки в каждой мелочи обслуживания.
cavilgerund / present participle Used attributively to describe someone given to petty fault-finding, e.g. "his cavilling remarks".