Grim and Slack

Grim

Grim adjective - Showing no signs of slackening or yielding in one's purpose.
Usage example: with grim determination, the woman worked three jobs to put her fatherless children through college

Slack is an antonym for grim.

Nearby Words: grimy, grimly, grimed

Slack

Slack adjective - Failing to give proper care and attention.

Grim is an antonym for slack.

Cite this Source
Slack and Grim. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/grim/slack
Grim & Slack. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/grim/slack>.
Slack or Grim. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/grim/slack.
Google Ngram Viewer shows how "grim" and "slack" have occurred on timeline