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on a treadmill

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ceaseless adj.
continuous adj.
futile adj.
interminable adj.
unavailing adj.
vain adj.

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.

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on a treadmill

The middle class is on a treadmill, and every year the belt speeds up.

From BBC ● Mar. 29, 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

“To walk on a treadmill or run on a treadmill for hours and hours like some people do, that’s not for me.”

From The Wall Street Journal ● Jan. 1, 2026

Beneath the sag of the buggy the hooves neatly rapid like the motions of a lady doing embroidery, diminishing without progress like a figure on a treadmill being drawn rapidly offstage.

From "The Sound and the Fury" by William Faulkner

on a treadmill

Example Sentences

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