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Definitions

day-and-night

ADJECTIVE

around-the-clock

Synonyms

STRONGEST

continuous endless interminable never-ending nonstop ongoing perpetual relentless round-the-clock unending uninterrupted

WEAK

24/7 all day and all night at all times ceaseless constant eternal everlasting persistent timeless unceasing

Antonyms

STRONGEST

bounded ceasing completed discontinuous ending finished halting incontinuous intermittent interrupted stopping terminable transient

ADJECTIVE

ceaseless

Synonyms

STRONGEST

constant continual continuous endless incessant nonstop perpetual unceasing unending unremitting

WEAK

amaranthine eternal everlasting indefatigable interminable on a treadmill 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 everlasting interminable looped no end of no end to on a treadmill 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

incessant

Synonyms

STRONGEST

ceaseless constant continual continuous endless interminable nonstop perpetual relentless round-the-clock unceasing unending unrelenting unremitting

WEAK

eternal everlasting interminate monotonous timeless unbroken

Antonyms

STRONGEST

bounded ceasing completed discontinuous ending finished halting inconstant infrequent intermittent interrupted irregular merciful occasional stopping sympathetic temporary terminable terminating transient

WEAK

broken

ADJECTIVE

interminable

Synonyms

STRONGEST

boundless continuous endless eternal incessant limitless long-winded never-ending perpetual protracted

WEAK

boring ceaseless constant dragged out dull everlasting immeasurable interminate long long-drawn-out looped no end of no end to on a treadmill 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

unceasing

Synonyms

STRONGEST

ceaseless continual continuous endless eternal never-ending perpetual persistent relentless unending uninterrupted unyielding

WEAK

constant everlasting lasting nonstop permanent round-the-clock steady

Antonyms

STRONGEST

brief broken ceasing completed discontinuous ending ephemeral finished halting infrequent intermittent interrupted occasional stopping surrendering temporary terminable transient yielding

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.

The device contains electrochemical sensors that continuously monitor intestinal gas production throughout the day and night.

From Science Daily • Mar. 14, 2026

Now they fire off messages from their phones and computers day and night.

From The Wall Street Journal • Mar. 11, 2026

It may also help scientists better predict how plants respond to environmental changes such as day and night cycles or flooding.

From Science Daily • Mar. 9, 2026

I will work day and night to turn this around but it is not just one person.

From BBC • Feb. 10, 2026

I felt guilty that I hadn’t visited him immediately in the hospital, so to make it up to him I quit my job and tended him day and night.

From "Educated" by Tara Westover

day-and-night

Example Sentences

Related Words