forslack

Century Dictionary and Cyclopedia

1. To neglect by idleness; relax; render slack; delay.

Wiktionary

1. v. intransitive, rare To slack up; be or grow slack; pall.
2. v. transitive, obsolete To be slack in; neglect by idleness; relax; render slack; delay; lose or spoil by slackness.

GNU Webster's 1913

1. v. obsolete To neglect by idleness; to delay or to waste by sloth.