Antonyms of adj cranky

2 senses of cranky

Sense 1
crank, cranky, tender, tippy -- ((used of boats) inclined to heel over easily under sail)

INDIRECT (VIA unstable) -> stable -- (resistant to change of position or condition; "a stable ladder"; "a stable peace"; "a stable relationship"; "stable prices")

Sense 2
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")

Similarity of adj cranky

2 senses of cranky

Sense 1
crank, cranky, tender, tippy -- ((used of boats) inclined to heel over easily under sail)
       => unstable (vs. stable) -- (lacking stability or fixity or firmness; "unstable political conditions"; "the tower proved to be unstable in the high wind"; "an unstable world economy")

Sense 2
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)