बदनामी या अपयश देने वाला।

हमें अकीर्तिकर कार्य नहीं करना चाहिए।
अकीर्तिकर, अपकीर्तिकर, अपयशस्क, अपवादजनक, अयशकर

(used of conduct or character) deserving or bringing disgrace or shame.

Man...has written one of his blackest records as a destroyer on the oceanic islands.
An ignominious retreat.
Inglorious defeat.
An opprobrious monument to human greed.
A shameful display of cowardice.
black, disgraceful, ignominious, inglorious, opprobrious, shameful