cav·il 
/ˈkævəl/ verb
cav·ils; US cav·iled or British cav·illed; US cav·il·ing or British cav·il·ling /ˈkævəl/ verb [no obj] formal : to complain about things that are not important
▪ I don't intend to cavil or compromise. ▪ A customer caviled about/over/at the price.
▪ I don't intend to cavil or compromise. ▪ A customer caviled about/over/at the price.
— cavil noun, plural cavils
[count] ▪ The reviewer had only a few cavils [=small criticisms] about the book. [noncount] ▪ The need for these changes is beyond cavil. [=cannot be doubted or argued about]
[count] ▪ The reviewer had only a few cavils [=small criticisms] about the book. [noncount] ▪ The need for these changes is beyond cavil. [=cannot be doubted or argued about]
