What is the opposite of slacken?

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

Verb
Opposite of to make less taut
Verb
Opposite of reduce or decrease in speed or intensity
Verb
Opposite of become less intense, violent, or severe
Verb
Opposite of to make (something tied, fastened, or fixed in place) less tight or firm
Verb
Opposite of to cause to move or proceed at a less rapid pace
Verb
Opposite of undo or be undone after winding or being wound
Verb
Opposite of to unfasten or untie
Verb
Opposite of fail to keep up with another or others in movement or development
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