Diluted is a term used to describe a substance that has been weakened or thinned out by the addition of another substance, usually water. The crossword solutions for this term are washy (5 letters), THIN (4 letters), WEAK (4 letters), WATERY (6 letters), thinned (7 letters), and watereddown (11 letters). All of these words refer to a substance that has been reduced in strength or concentration due to the addition of another substance.