What is the opposite of slack?

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

Adjective
Opposite of not taut or held tightly in position
Adjective
Opposite of baggy or loose-fitting
Adjective
Opposite of having or showing laziness, disregard or negligence
Adjective
Opposite of having a relaxed, friendly, or unofficial style, manner, or nature
Adjective
Opposite of slow or sluggish
Adjective
Opposite of not fixed in place tightly or firmly
“You must have a tight rope to ensure your safety when you abseil down this mountain.”
Adjective
Opposite of slow to act
Adjective
(of activity) Opposite of sluggish or slow-moving
“The office and its staff always seem very lively when Friday rolls around.”
Adjective
Opposite of irresponsible or negligent in behavior
Adjective
Opposite of lacking in activity or progress
“Business is usually booming after the summer holidays when most people are back from their vacation.”
Adjective
Opposite of boring and rather dull in nature
“It was a gripping documentary about a mountaineer who survived a fall.”
Adjective
Opposite of not showing a proper sense of care or responsibility
Adjective
Opposite of having or characterized by many transient sexual relationships
Adjective
Opposite of done or acting in an indifferent or apathetic manner
“He displays a passionate disposition to saving endangered wildlife.”
Adjective
Opposite of stationary and not moving
Noun
Opposite of an allowable scope or margin of variation or freedom
Noun
Opposite of scope for freedom of action or thought
Noun
Opposite of the space in or through which a mechanism can or does move
“She criticized the narrowness of the parking spaces at this key central location.”
Noun
Opposite of the act or state of sagging
Verb
Opposite of to procrastinate or be lazy, especially with work or responsibilities
Verb
Opposite of to decrease or reduce in intensity, quantity, or speed
Verb
Opposite of to spend one's time in an aimless, idle way
Verb
Opposite of to laze around, mostly doing nothing
“I really should move about a little after being sedentary for hours.”
Verb
Opposite of to quench or satisfy (one's thirst)
Verb
Opposite of to act or move slowly or lazily
Verb
Opposite of to make, or become, less taut
“He felt Roger tighten his grip on him and looked down at his brother.”
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