Particular meaning is fairly elusive. It refers to someone who is extremely picky and critical. A persnickety individual often pay strict attention to detail and has high standards when it comes to standards and flawlessness. Their fastidious nature can be viewed as laudable, but it can also lead to overly demanding disapproval and avoidable dissatisfaction. Being persnickety is regularly related to precise attention to detail but can also be seen as a manifestation of perfectionism.