Synonyms: fractious, cranky, scratchy, irritable, peckish, peevish, pettish, petulant, nettlesome, techy, testy, tetchy
Definition: easily irritated or annoyed
Usage: an incorrigibly fractious young man; not the least nettlesome of his countrymen
Similar words: ill-natured
Definition: having an irritable and unpleasant disposition
Synonyms: crank, cranky, tippy, tender
Definition: (used of boats) inclined to heel over easily under sail
Similar words: unstable
Definition: lacking stability or fixity or firmness
Usage: unstable political conditions; the tower proved to be unstable in the high wind; an unstable world economy