de-motivating (part of speech: verb)
depressing (part of speech: verb)
dissuading (part of speech: verb)
dampening, discouraging, disinclining, banning, derailing, restraining, diverting, barring, averting, disheartening, preventing, checking, daunting, admonishing, chilling, inhibiting, dissuading, intimidating, deterring, deflecting
lowering (part of speech: verb)
boring (part of speech: adjective)
- It was a moist, horrible, depressing August day. - "The Red Planet", William J. Locke.
- We are still in the depths of the depressing gloom. - "In-Darkest-England-and-the-Way-Out", Booth, William.
- It was a sad Christmas time, and had a depressing effect even on the young spirits of Dorothy. - "Dorothy Dale in the City", Margaret Penrose.