unpropitious

/ˌənprəˈpiSHəs/
adjective

1. (of a circumstance) not giving or indicating a good chance of success
2. unfavorable

She had a thin awkward figure, a sallow skin without colour, dark lank hair, and strong features; — so much for her person; — and not less unpropitious for heroism seemed her mind.

– Jane Austen, Northanger Abbey