💎 Extremely hard 🧱 Completely unyielding

adamantine

1 9.9

Very hard and difficult to break, like a diamond

adjective
/ˌædəˈmæntiːn/

Literature

: adamantino

The construction team used adamantine materials to ensure the skyscraper could withstand any storm.

Examples

China's rulers, opposing power to power, mean to break this circle, binding the river god in an adamantine net.

Fiction book (2001)
The jeweler praised the ring's adamantine brilliance, likening it to the hardest diamond.
Her adamantine resolve in defending her beliefs impressed everyone at the debate.

Synonyms

indestructible

vsadamantine

33 5.3

Very hard to break or damage

emphasizes extreme hardness like a diamond rather than general durability

unbreakable

vsadamantine

27 2.7

Very strong and hard to damage in normal use

adds the idea of diamond like extreme hardness beyond normal resistance

as solid as granite

vsadamantine

1 4.3

Very strong and not likely to break or change

specifies far greater hardness, comparing to a precious hard stone not stability

non-breakable

vsadamantine

1 3.6

Not easy to break, even if dropped

is more about extreme diamond like hardness than simple resistance to shattering

diamantine

vsadamantine

Literature

1 9.9

Having a bright, sparkling look like a clear gem

means actual extreme hardness like a diamond rather than just appearance

adamantium

vsadamantine

9.9

Extremely strong and not able to be broken

is literal extreme hardness like a precious stone rather than figurative

Antonyms

soft

557 1.0

Easily pressed when you touch it

fragile

45 3.4

Easily broken or damaged because it is not strong

How Hard

adamantine

Literature

1 9.9

hard

631 1.0

firm

87 1.0

soft

557 1.0

Surface Forms

adamantine positive

Morphology

adamantine = adamant (transparent) = adamant + ine

Formed from 'adamant' (a very hard substance/diamond) + '-ine' meaning 'of or like', so the meaning 'like a diamond/unbreakable' is directly derived.

Etymology

Adamantine comes from an old Greek word adamas meaning 'unbreakable' and shares the same root as diamond. So if something is adamantine it is extremely hard or unbreakable, like a diamond.