stickler

[ stik-ler ]
/ ˈstɪk lər /

noun

a person who insists on something unyieldingly (usually followed by for): a stickler for ceremony.
any puzzling or difficult problem.

Origin of stickler

First recorded in 1530–40; stickle + -er1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for stickler

British Dictionary definitions for stickler

stickler
/ (ˈstɪklə) /

noun

(usually foll by for) a person who makes insistent demandsa stickler for accuracy
a problem or puzzlethe investigation proved to be a stickler
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012