Answer: stickle

AnswerCrossword Clue
STICKLEArgue trivially
STICKLECarp
STICKLEBe very scrupulous.
STICKLEContend stubbornly.
stickleto raise objections; scruple; demur
stickleto argue or haggle insistently, esp. on trivial matters
stickleto argue stubbornly