What nautical term refers to the side of the boat that is opposite the direction of the wind?

The term that refers to the side of the boat that is opposite the direction of the wind is "leeward." In nautical contexts, understanding the wind's direction is crucial for navigation and sail adjustment. When the wind is blowing towards the vessel, the side that the wind is hitting is termed "windward," while the other side, where the wind is not directly affecting the boat, is referred to as "leeward."

Distinguishing between these terms is vital for maneuvering a vessel effectively in different wind conditions. Knowledge of leeward and windward positions helps in planning sails and understanding how the boat will behave on the water, especially during sailing when tacking and jibing are considerations.