Webster's Revised Unabridged Dictionary · 1913

Disadvantageous

Disadvantageous , adjective

[Compare French désavantageux.]

Attended with disadvantage; unfavorable to success or prosperity; inconvenient; prejudicial; -- opposed to advantageous; as, the situation of an army is disadvantageous for attack or defense.
Even in the disadvantageous position in which he had been placed, he gave clear indications of future excellence. — Prescott