Noah Webster
Dubious
DUBIOUS, adjective [Latin See Doubt. The primary sense is probably to turn or to waver.]
1. Doubtful; wavering or fluctuating in opinion; not settled; not determined; as, the mind is in a dubious state.
2. Uncertain; that of which the truth is not ascertained or known; as a dubious question.
3. Not clear; not plain; as dubious light.
4. Of uncertain event or issue.
In dubious battle.