intolerant (adj.)
1735, from Latin intolerantem (nominative intolerans) "not enduring, impatient, intolerant; intolerable," from in- “not” (see in- (1)) + tolerans, present participle of tolerare “to bear, endure” (see toleration). Of plants, from 1898. The noun meaning "intolerant person or persons" is from 1765.