The term 'slacken' is defined as to become less strict or intense, and can be used in a variety of contexts. The crossword solutions for this term include 'DECREASE' (8 letters), 'WANE' (4 letters), 'LAG' (3 letters), 'GIVE' (4 letters), 'DELAY' (5 letters), 'EBB' (3 letters), 'REMIT' (5 letters), 'LETUP' (5 letters), 'SAG' (3 letters), 'EASE' (4 letters), 'LOOSEN' (6 letters), 'RELAX' (5 letters), 'ABATE' (5 letters), 'notv' (4 letters), 'easeup' (6 letters), 'RELENT' (6 letters), and 'easeoff' (7 letters). All of these words are related to the idea of becoming less strict or intense, and can be used to describe a situation in which something is decreasing in intensity or becoming less strict.