Indurate and Unbreakable

Indurate adjective - Having or showing a lack of sympathy or tender feelings.

Unbreakable and indurate are semantically related. In some cases you can use "Unbreakable" instead an adjective "Indurate".

Unbreakable adjective - Impossible to break especially under ordinary usage.

Indurate and unbreakable are semantically related. Sometimes you can use "Indurate" instead an adjective "Unbreakable".