What is the opposite of speed up?

Need antonyms for speed up? Here's a list of opposite words from our thesaurus that you can use instead.

Verb
Opposite of to increase in speed
Verb
Opposite of to hasten the progress of or make easier
axUS
axeUK
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“Disruptive tactics were deliberately used to hinder the process of coming to an agreement.”
Verb
Opposite of to be quick about something
Verb
Opposite of liven up
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