"slacked" in the verb sense

1. slack

avoid responsibilities and work, be idle

2. slack

be inattentive to, or neglect

"He slacks his attention"

3. slack

release tension on

"slack the rope"

4. slack, slacken, slack up, relax

make less active or fast

"He slackened his pace as he got tired"

"Don't relax your efforts now"

5. slow, slow down, slow up, slack, slacken

become slow or slower

"Production slowed"

6. slake, abate, slack

make less active or intense

7. abate, let up, slack off, slack, die away

become less in amount or intensity

"The storm abated"

"The rain let up after a few hours"

8. slack, slake

cause to heat and crumble by treatment with water

"slack lime"

Source: WordNet® (An amazing lexical database of English)

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