to find small, unimportant faults in something
искать мелкие, неважные ошибки в чем-либо (iskat melkiye nevazhniye oshibki v chom libo)
"Stop nitpicking every little mistake I make!"
"Перестань придираться к каждой моей мелкой ошибке!" (perestan pridratsya k kazhdoy moyey melkoy oshibke)
Very quickly, almost instantaneously.
to finish or conclude something
to reduce differences or improve relations
to achieve something very difficult
it's very easy
to start behaving more responsibly.