(n.) Legs able to maintain their possessor upright in stormy weather at sea, that is, ability stand or walk steadily on deck when a vessel is rolling or pitching in a rough sea.

ability address adeptness adroitness airmanship artfulness artisanship artistry bravura brilliance capability capacity cleverness command competence control coordination craft craftsmanship cunning deftness dexterity dexterousness dextrousness diplomacy efficiency expertise facility finesse grace grip handiness horsemanship ingeniousness ingenuity know-how marksmanship mastership mastery practical ability proficiency prowess quickness readiness resource resourcefulness savoir-faire savvy sea legs seamanlikeness seamanliness shipmanship skill skillfulness style tact tactfulness technical brilliance technical mastery technical skill technique timing virtuosity weather eye wit wizardry workmanship