Definition for Slack up:

• make less active or fast; " He slackened his pace as he got tired"; " Don't relax your efforts now"

Synonyms for Slack up:

• v.

  •change (verb)
  • relax,
  • slacken,
  • slack up.

• Other synonyms:

  •v.
  • decrease,
  • minify,
  • slack.
  •Other relevant words:
  • lessen.

Antonyms for Slack up:

• v.

  • lessen
    increase, raise, enlarge, extend, strengthen.

Homophones for Slack up:

• skullcap, salsify, selkup, slick up, slice up, slack off, slough off, slagheap, school ship.

Hyponym for Slack up:

• v.

  • change
    decrease, minify, lessen.