The term 'HALF MASK' can be broken down into two crossword solutions: DOMINO (6 letters) and LOUP (4 letters). A DOMINO is a small, rectangular tile with a line dividing it into two equal parts. Each half of the tile contains a number of spots, or pips, which are used to play various games. A loup is a type of mask that covers the lower half of the face. It is usually worn during carnivals or masquerade balls.