Antonyms of adj irritable

3 senses of irritable

Sense 1
cranky, fractious, irritable, nettlesome, peevish, peckish, pettish, petulant, scratchy, testy, tetchy, techy -- (easily irritated or annoyed; "an incorrigibly fractious young man"; "not the least nettlesome of his countrymen")

INDIRECT (VIA ill-natured) -> good-natured -- (having an easygoing and cheerful disposition; "too good-natured to resent a little criticism"; "the good-natured policeman on our block"; "the sounds of good-natured play")

Sense 2
irritable -- (abnormally sensitive to a stimulus)

INDIRECT (VIA sensitive) -> insensitive -- (not responsive to physical stimuli; "insensitive to radiation")

Sense 3
excitable, irritable -- (capable of responding to stimuli)

INDIRECT (VIA sensitive) -> insensitive -- (not responsive to physical stimuli; "insensitive to radiation")

Similarity of adj irritable

3 senses of irritable

Sense 1
cranky, fractious, irritable, nettlesome, peevish, peckish, pettish, petulant, scratchy, testy, tetchy, techy -- (easily irritated or annoyed; "an incorrigibly fractious young man"; "not the least nettlesome of his countrymen")
       => ill-natured (vs. good-natured) -- (having an irritable and unpleasant disposition)

Sense 2
irritable -- (abnormally sensitive to a stimulus)
       => sensitive (vs. insensitive) -- (responsive to physical stimuli; "a mimosa's leaves are sensitive to touch"; "a sensitive voltmeter"; "sensitive skin"; "sensitive to light")

Sense 3
excitable, irritable -- (capable of responding to stimuli)
       => sensitive (vs. insensitive) -- (responsive to physical stimuli; "a mimosa's leaves are sensitive to touch"; "a sensitive voltmeter"; "sensitive skin"; "sensitive to light")