SLACK is validvalid

not tight or taut [adj SLACKER, SLACKEST] : SLACKLY [adv], SLACKNESS [n] / to slacken [v SLACKED, SLACKING, SLACKS]

12,883 of 196,601 in NWL2023·also valid in CSW24

not tight or taut [adj SLACKER, SLACKEST, SLACKLY] / to slacken [v -ED, -ING, -S]