IPA: /ɪˈnjʊəd/
KK: /ɪˈnjʊrd/
Made strong or tough through repeated experience or exposure to difficult situations.
After years of training in harsh conditions, the athletes became enured to the challenges they faced.
Enured comes from the Old French 'enurer', which means to accustom or to harden. The prefix 'en-' (meaning to cause to be) combined with 'ure' (meaning to make or to become) indicates the process of becoming accustomed or hardened to something.
Think of the process of 'causing to become accustomed' — that's what enured means, to be made used to something.