iron-fisted (adjective) merciless: mean, heartless
Sinonime: abyssal, aquatic, boating, cruising, deep-sea, marine, maritime, navigating, navigational, oceangoing, oceanic, oceanographic, pelagic, rowing, sailing, sailorly, salty, sea-loving, seafaring, seagoing, thalassic, yachting
Antonime: giving,
kind,
merciful,
nice, sparing,
sympathetic