Particular meaning is somewhat difficult to understand. It refers to someone who is exceptionally meticulous and critical. A persnickety individual usually nitpick and has high standards when it comes to expectations and perfection. Their meticulousness can be viewed as laudable, but it can also exacerbate extreme criticism and superfluous dissatisfaction. Being persnickety is commonly related to meticulous attention to detail but can also be seen as a manifestation of pedantry.
