IPA: //ˈnɪtˌpɪk.i.ɪst//
KK: /ˈnɪtˌpɪk.i.ɪst/
This word describes someone who is very concerned with small details and often finds faults in things that are not important.
She is known for being the nitpickiest person in the office, always pointing out minor mistakes.
Nitpickiest → It is formed from "nitpick" (a compound of "nit" (meaning a louse egg) and "pick" (meaning to choose or select)) and the superlative suffix "-iest" (meaning most). The word "nitpickiest" refers to someone who is most concerned with trivial details or minor errors.
Think of someone who is 'choosing' ('pick') the tiniest details ('nit') — that's why the nitpickiest person is the one who focuses the most on small mistakes.
No commonly confused words.