Particular meaning is somewhat tricky to comprehend. It refers to someone who is vitally picky and critical. A persnickety individual usually nitpick and has high standards when it comes to criteria and flawlessness. Their meticulousness can be perceived as commendable, but it can also intensify extreme criticism and unnecessary dissatisfaction. Being persnickety is typically associated with precise attention to detail but can also be seen as a type of perfectionism.