Radar acquisition has always been a persnickety thing to test properly on Earth.
In the early years, she was regarded as persnickety but a helpful ally who returned calls promptly.
His keepers fed the beast copious amounts of port, Champagne, and whiskey to pacify the persnickety pachyderm.
1889, alteration of pernickety (q.v.).
Overfastidious; finical; fussy
[first form 1905+, second 1814+; fr Scots dialect]