159 Synonyms Antonyms of PERSNICKETY MerriamWebsterPersnickety definition is fairly difficult to understand. It refers to someone who is exceedingly choosy and judgmental. A persnickety individual tends to be fastidious and does not settle for less when it comes to criteria and flawlessness. Their attention to detail can be perceived as commendable, but it can also intensify excessive censure and unjustified dissatisfaction. Being persnickety is typically connected with precise focus on specifics but can also be seen as a manifestation of perfectionism.