slackening

Plural: slackenings

Noun

• an occurrence of control or strength weakening
  • "the slackening of the wind"
• The act by which something slackens; loss of speed, tautness, etc.

Verb

• become slow or slower
• make less active or fast
• become looser or slack
• make slack as by lessening tension or firmness
• present participle and gerund of slacken

Synonyms

loosening, relax, relaxation, remit, slack, slack up, slacken, slow, slow down, slow up