adamantine

Adjective

Positive adamantine

Comparative more adamantine

Superlative most adamantine

1. If a substance is adamantine, it is as hard as a diamond.
2. If something is adamantine, it is not easy to change.
   • Synonyms: adamant, inexorable, inflexible, intransigent and resolute
   • Antonym: flexible

Related words

• adamant
• adamance
• adamantly