Particular meaning is somewhat elusive. It refers to someone who is extremely picky and disapproving. A persnickety individual often nitpick and does not settle for less when it comes to criteria and flawlessness. Their fastidious nature can be viewed as laudable, but it can also intensify unwarranted disapproval and avoidable dissatisfaction. Being persnickety is commonly associated with precise attention to detail but can also be seen as a type of obsessiveness.