All slack antonyms
slack
S s adj slack
- in full swing — to cause to move to and fro, sway, or oscillate, as something suspended from above: to swing one's arms in walking.
- gummous — consisting of or resembling gum; gummy.
adjective slack
- watertight — constructed or fitted so tightly as to be impervious to water: The ship had six watertight compartments.
- nonporous — full of pores.
noun slack
- astriction — to bind fast; constrain.