Mal de mer, also known as seasickness, is a condition caused by the motion of a boat or ship on the water. It is characterized by nausea, dizziness, and fatigue. The term mal de mer is French for 'sickness of the SEA' and is composed of two words: mal, meaning 'ILLNESS' or 'BAD, ' and mer, meaning 'SEA.' The crossword solutions for this term are MER (3 letters) and TETE (4 letters). MER is an abbreviation of the French word mer, while TETE is an abbreviation of the French word tête, meaning 'HEAD.' Together, these two words form the phrase mal de mer, which literally translates to 'sickness of the SEA.'