IPA: /ˌoʊvərpərˈtɪkjələr/
KK: /oʊvərpərˈtɪkjələr/
Being very picky or demanding about details, often to an excessive degree.
She is so overparticular that she won't accept any food that isn't perfectly prepared.
Overparticular → It is formed from "over-" (meaning excessively) and "particular" (from Latin "particularis", meaning specific or individual). The word "overparticular" means excessively specific or overly concerned with details.
Think of being excessively concerned ('over-') with specific details ('particular') — that's why overparticular means being overly specific.