The term 'slacks off' can be summarized by the crossword solutions abates (6 letters), LOAFS (5 letters), and eases (5 letters). Abates means to reduce in intensity or degree, LOAFS means to idle or laze around, and eases means to make less difficult or less severe. Together, these words suggest that when someone slacks off, they are reducing their effort, idling, and making their work less difficult.