Final answer:
Poseidon is often depicted holding a trident, which is a three-pronged weapon associated with the god of the sea.
Step-by-step explanation:
Poseidon is often depicted as holding a trident. The trident is a three-pronged weapon or fishing tool that is associated with the god of the sea. The word 'trident' comes from the Latin roots 'tri-' meaning three and 'dens' meaning tooth.
Learn more about Greek and Latin roots