IPA: /ˌæd.əˈmæn.taɪn/
KK: /ˌæd.əˈmæn.tin/
Describing something that is extremely hard, unyielding, or inflexible, often compared to the hardness of a diamond.
Her adamantine resolve helped her overcome all obstacles in her path.
Adamantine → It is derived from the Greek word "adamas" (meaning unbreakable or invincible) and the suffix "-ine" (meaning of or pertaining to). The term "adamantine" refers to something that is unyielding or inflexible, often used to describe a quality of hardness or durability.
Think of something that is 'unbreakable' ('adamas') and remember that 'adamantine' describes something that is incredibly hard or unyielding.