Describes a physical quality where an object resists changes in shape or condition when force is applied, making it difficult to deform or break.

Refers to a situation where two entities are firmly connected or united, making it difficult for them to separate or part ways.

Indicates a mental state characterized by steadfastness and resilience, where one's beliefs or decisions remain unchanged despite pressure or persuasion.

Describes a personality trait of being inflexible or rigid in one’s opinions and unwilling to consider alternative viewpoints, often perceived as stubbornness.

Denotes an emotional or social demeanor that lacks warmth or softness, often associated with tension or stiffness in expression and interactions.

Refers to a manner of communication or presentation that is overly serious or lacking in lightheartedness, often seen as formal or solemn.

Indicates reliability and trustworthiness, suggesting that actions or promises are carried out without frivolity or untrustworthiness.