Overly diluted is a term used to describe a substance that has been weakened or thinned out. It can be used to describe a liquid, such as water, or a mixture of two or more substances. The crossword solutions for this term are WATERY (6 letters), WEAK (4 letters), and THIN (4 letters). WATERY implies that the substance has been diluted with too much water, while WEAK suggests that it has been weakened by having some of its components removed. THIN implies that the substance has been reduced in thickness or viscosity.