Particular meaning is somewhat difficult to understand. It refers to someone who is extremely particular and critical. A persnickety individual tends to pay strict attention to detail and sets the bar high when it comes to expectations and excellence. Their meticulousness can be regarded as praiseworthy, but it can also intensify unreasonable disapproval and unnecessary dissatisfaction. Being persnickety is commonly related to exact focus on specifics but can also be seen as a type of perfectionism.
