slacken

verb

1. become slow or slower

Similar word(s): slack, slow

Definition categories: change, weaken

2. make less active or fast

- He slackened his pace as he got tired

Similar word(s): relax, slack

Definition categories: change, decrease, lessen, minify

3. become looser or slack

- the rope slackened

Definition categories: change, weaken

4. make slack as by lessening tension or firmness

Similar word(s): remit

Definition categories: change, loose, loosen