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adj. Enduring pain and hardship without showing feeling or complaint.

Of, pertaining to, or characteristic of the Stoics; hence, manifesting or maintaining indifference to pleasure or pain; exhibiting or proceeding from calm fortitude: as, stoical indifference.

adj. seeming unaffected by pleasure or pain; impassive

"After awhile he moved, lifted his head, and looked about him dully at first and then with a certain stoical acceptance of his plight."

unemotional   

stoical ethics   

impassive   

stoic    stolid    imperturbable    unshaken    impassible    fatalistic    apathetic    unsmiling    unemotional    uncomplaining