1. Become slow or slower
   - slow, slow down, slow up, slack 
2. Make less active or fast
   "He slackened his pace as he got tired"
   - slack, slack up, relax 
3. Become looser or slack
   "the rope slackened" 
4. Make slack as by lessening tension or firmness
   - remit

Derived forms: slackened, slackening, slackens

See also: slacken off, slackening

Type of: decrease, lessen, loose, loosen, minify, weaken

• strategic intelligence
• strategic warning
• strategical
• strategically
• strategics
• strategist
• strategy
• Stratford
• Stratford-on-Avon
• Stratford-upon-Avon
• strath
• strathspey
• stratification
• stratified
• stratified language
• stratified sample
• stratified sampling
• stratiform
• stratify
• stratigraphy
• stratocracy
• stratocumulus
• stratosphere
• stratospheric
• stratum