intolerant

adj

1. Unable or indisposed to tolerate, endure or bear.
2. (often, postpositional)Unable to digest food or be given substances of a certain composition without adverse effects.

   “Near-synonym: allergic”

   “I am intolerant of lactose, so I can't drink milk”

   “I am lactose-intolerant, so I can't drink milk.”

   “When our bodies no longer create the enzyme needed to break down lactose, we can become intolerant to it.”

   “The oak, as is well known, is a slow-growing, dicotyledonous tree of peculiar spreading habit, and very intolerant of shade.”

3. Not tolerant; close-minded about new or different ideas; indisposed to tolerate contrary opinions or beliefs; impatient of dissent or opposition; denying or refusing the right of private opinion or choice in others; inclined to persecute or suppress dissent.

   “Whilſt Congregationaliſts in England were complaining of the intolerant ſpirit of Epiſcopalians there”

   “They ſhewed their intolerant ſpirit by demanding a ſtrict execution of the penal laws againſt Catholics”

noun

1. One who is intolerant; a bigot.

   “[…] a portion of the prejudice which darkened the spirits of these intolerants, might perhaps have cast its shadow over him.”