The term 'lighten' can be defined as making something less heavy, intense, or serious. This term can be used in a variety of contexts, such as reducing the burden of a task or alleviating a difficult situation. The crossword solutions for this term include 'LIGHT' (5 letters), 'THIN' (4 letters), 'JETTISON' (8 letters), 'REDUCE' (6 letters), 'ALLAY' (5 letters), 'ATTENUATE' (9 letters), 'MITIGATE' (8 letters), 'MOLLIFY' (7 letters), 'RELIEVE' (7 letters), 'BLEACH' (6 letters), 'EASE' (4 letters), and 'LETUP' (5 letters). All of these words are related to the concept of lightening something, whether it be through reducing, thinning, jettisoning, allaying, attenuating, mitigating, mollifying, relieving, bleaching, easing, or letting up.