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Particular sense is somewhat elusive. It refers to someone who is extremely meticulous and fault-finding. A persnickety individual typically be meticulous and has high standards when it comes to quality and perfection. Their attention to detail can be perceived as commendable, but it can also magnify extreme disapproval and avoidable dissatisfaction. Being persnickety is often related to thorough attention to detail but can also be seen as a form of obsessiveness.
Persnickety Definition Meaning MerriamWebster