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Contexts ▼

Not having a material or physical form

Weak, feeble, or lacking in strength

Lacking physical strength, weight or firmness

Having no basis in reality

Unsound, not backed by facts

Flimsy, or made of flimsy material

Having a sense of vagueness, insubstantiality, or incongruousness

Not likely to be true or to happen

Too small or unimportant to be worth consideration

(of a mixture or effect) Delicately complex and understated

Subject to dispute or questions

Dreamy and unaware of one's surroundings, for example because one is in love

Based on abstract reasoning

Light and entertaining but of little substance

Useless or having no chance of success

Emphasizing insignificance

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Adjective

Not having a material or physical form

imperceptible to the touch

hard to describe

unable to be touched

extraterrestrial

unanalysable^UK

unanalyzable^US

defying description

more ❯

“Hearing this, Scipio strove eagerly to embrace his mother, but thrice the unsubstantial ghost eluded his grasp.”

Adjective

Weak, feeble, or lacking in strength

in declining health

rendered feeble

out of condition

under the weather

on the sick list

green about the gills

not in good shape

in poor condition

not up to snuff

out of commission

hospitalized^US

under medication

hospitalised^UK

confined to bed

like death warmed up

at death's door

not feeling well

the worse for wear

hypochondriacal

chronically ill

long in the tooth

no spring chicken

running temperature

feeling terrible

gone to rack and ruin

falling to pieces

more ❯

“Upon hearing his speech, the crowd dispersed, unconvinced by his unsubstantial tone and manner of speaking.”

Adjective

Lacking physical strength, weight or firmness

thrown together

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“Halliburton possessed what some critics called a slight and unsubstantial physique, compared with Hemingway's sturdier and more muscular frame.”

Adjective

Having no basis in reality

fool's paradise

all in one's head

all in the mind

out of this world

figment of imagination

product of someone's imagination

hard to swallow

castles in the air

more ❯

“We must distinguish an external object of nature from some unsubstantial figment of fantasy or hallucination that has little semblance of reality.”

Adjective

Unsound, not backed by facts

lacking substance

inconsequential

unsubstantiated

without foundation

not making sense

beyond the bounds of possibility

self-contradictory

won't hold water

more ❯

“In the dawning light, the unsubstantial theory may melt away, but the ultimate facts will remain.”

Adjective

Flimsy, or made of flimsy material

light as a feather

more ❯

“The unsubstantial fabric of her dress left nothing to the imagination.”

Adjective

Having a sense of vagueness, insubstantiality, or incongruousness

phantasmagorical

indistinguishable

unrecognizable^US

lacking definition

unrecognisable^UK

phantasmagorial

phantasmagorian

more ❯

Adjective

Not likely to be true or to happen

incomprehensible

imcomprehensible

hard to swallow

scarcely credible

out of the question

extremely doubtful

extremely implausible

extremely unlikely

extremely difficult to believe

not in the least likely

beyond the bounds of possibility

not to be thought of

won't hold water

hard to believe

difficult to believe

highly unlikely

not able to hold water

out of the ordinary

out of this world

beyond one's wildest dreams

inconsequential

beyond the realm of reason

beyond possibility

unsubstantiated

supercalifragilisticexpialidocious

taking the cake

uncharacteristic

feather-brained

weird and wonderful

out of the common

thin on the ground

few and far between

too good to be true

beyond all reason

out of all reason

never to be forgotten

out-of-this-world

like a dream come true

out of the blue

off beaten path

self-contradictory

sensationalized^US

sensationalised^UK

potentially dangerous

potentially false

not quite right

open to suspicion

under suspicion

castles in the air

inapprehensible

beyond description

beggaring description

highly coloured

too sacred for words

not understandable

hardly possible

not worth considering

like herding cats

contrary to reason

off the beaten track

more ❯

Adjective

Too small or unimportant to be worth consideration

inconsequential

of little consequence

of little import

of little importance

of minor importance

of no importance

of no consequence

nickel-and-dime

not worth mentioning

not worth speaking of

of no great concern

of little account

too little too late

not worth bothering about

twopenny-halfpenny

neither here nor there

beside the point

no great shakes

of no significance

hardly worth mentioning

of less importance

smallest amount of

more ❯

Adjective

(of a mixture or effect) Delicately complex and understated

Adjective

Subject to dispute or questions

unsubstantiated

open to question

wide of the mark

open to suspicion

subject to debate

hard to believe

under suspicion

not quite right

potentially false

potentially dangerous

open to discussion

yet to be decided

on the back burner

far from certain

in no man's land

without foundation

not backed up by evidence

more ❯

Adjective

Dreamy and unaware of one's surroundings, for example because one is in love

Adjective

Pale

Adjective

Based on abstract reasoning

unsubstantiated

in the abstract

based on guesswork

more ❯

Adjective

Light and entertaining but of little substance

lacking substance

inconsequential

feather-brained

one-dimensional

lacking seriousness

lacking in sense

tongue-in-cheek

dead from the neck up

off your trolley

not thinking clearly

with a mind like a sieve

beyond all reason

out of all reason

devoid of intelligence

more ❯

Adjective

Small and weak

unconsequential

miniaturized^US

knee-high to a grasshopper

miniaturised^UK

a slip of a …

knee high to a grasshopper

nickel-and-dime

not worth bothering about

invisible to the naked eye

extremely small

barely perceptible

undistinguishable

with no room to swing a cat

knee high to a gnat

close to the ground

economic of space

more ❯

Adjective

Useless or having no chance of success

no good to gundy

without rhyme or reason

inconsequential

counterproductive

good-for-nothing

without success

not worth the candle

disadvantageous

nickel-and-dime

not having a prayer

with no chance of success

save one's breath

spinning one's wheels

wild goose chase

of no earthly use

in vicious circle

lacking foundation

without grounds

without foundation

not worth a hill of beans

non-functioning

not good enough

twopenny-halfpenny

of little account

more ❯

Determiner

Emphasizing insignificance

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Related Words and Phrases

unsubstantially

unsubstantiality

unsubstantialities

See Also

What is the opposite of unsubstantial?
Sentences with the word unsubstantial
Words that rhyme with unsubstantial
What is the adjective for unsubstantial?
What is the noun for unsubstantial?
What is the adverb for unsubstantial?
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Nearby Words

unsubstantialities

unsubstantiality

unsubstantially

unsubstantiated

unsubstantiated information

unsubstantiatedly

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