The Collaborative International Dictionary
Maistry
Maistre \Mais"tre\, Maistrie \Mais"trie\, Maistry \Mais"try\, n.
Mastery; superiority; art. See Mastery. [Obs.]
--Chaucer.
Wiktionary
maistry
n. 1 (label en obsolete) mastery. 2 A foreman.