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on a treadmill

ADJECTIVE
ceaseless
Synonyms
STRONGEST
constant continual continuous endless incessant nonstop perpetual unceasing unending unremitting
WEAK
amaranthine day-and-night eternal everlasting indefatigable interminable perennial round-the-clock uninterrupted untiring world-without-end
Antonyms
STRONGEST
broken ceasing completed discontinuous ending finished halting inconstant intermittent interrupted stopping temporary terminable terminating transient
WEAK
concluded infrequent irregular occasional
ADJECTIVE
continuous
Synonyms
STRONGEST
continued endless extended regular repeated stable steady unbroken unceasing uninterrupted
WEAK
connected consecutive day-and-night everlasting interminable looped no end of no end to perpetual prolonged timeless undivided unfaltering
Antonyms
STRONGEST
broken discontinuous imbalanced intermittent unfixed unstable unsteady wobbly
WEAK
ceasing completed ending finished halting interrupted sporadic stopping
ADJECTIVE
futile
Synonyms
STRONGEST
fruitless hollow impractical ineffective ineffectual insufficient trivial unproductive unprofitable unsuccessful useless vain worthless
WEAK
abortive barren bootless delusive empty exhausted forlorn idle impracticable in vain no dice nugatory otiose out the window profitless resultless save one's breath sterile to no avail to no effect to no purpose trifling unavailing unimportant unneeded unreal unsatisfactory unsubstantial valueless
Antonyms
STRONGEST
effective fruitful helpful productive profitable successful useful valuable worthwhile
WEAK
hopeful
ADJECTIVE
interminable
Synonyms
STRONGEST
boundless continuous endless eternal incessant limitless long-winded never-ending perpetual protracted
WEAK
boring ceaseless constant day-and-night dragged out dull everlasting immeasurable interminate long long-drawn-out looped no end of no end to permanent spun out strung-out timeless unbound unceasing uninterrupted unlimited wearisome
Antonyms
STRONGEST
brief ceasing ending ephemeral halting intermittent interrupted limited stopping temporary terminable transient
WEAK
bounded finite
ADJECTIVE
unavailing
Synonyms
WEAK
barren empty exhausted fruitless idle impractical in vain ineffective ineffectual save one's breath to no avail to no effect to no purpose trifling trivial unproductive unprofitable unsuccessful useless vain valueless worthless
ADJECTIVE
vain
Synonyms
STRONGEST
frivolous fruitless petty trivial
WEAK
abortive barren bootless delusive delusory empty going nowhere hollow idle in vicious circle inefficacious insignificant misleading no-win not a prayer nugatory otiose paltry pointless profitless puny senseless shuck slight sterile time-wasting trifling unavailing unimportant unnotable unproductive unprofitable valueless void worthless
Antonyms
STRONGEST
consequential important significant useful
WEAK
modest possible shy

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Hybrid training, like Hyrox, which is sociable and competitive, seems to have taken over from running on a treadmill or general cardio on a bike, she explains.

From BBC ● Sep. 24, 2026

I’m never going to be on a treadmill or anything like that.

From Los Angeles Times ● Sep. 14, 2026

The pattern holds whether scientists are testing how fast lizards run on a treadmill, measuring how sharks swim in the ocean, or tracking how quickly bacterial cells divide.

From Science Daily ● Mar. 12, 2026

A Brazilian man with a penchant for sporting records breaks a new one after tackling the most boring physical challenge he could dream up: running on a treadmill for 24 hours.

From Barron's ● Feb. 6, 2026

All of life was like running on a treadmill.

From "My Brother Sam is Dead" by James Lincoln Collier and Christopher Collier

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