Prone

1. Prostrate; flat; esp., lying with the face down; -- opposed to supine.
2. Bending forward; inclined; not erect.
3. Sloping, with reference to a line or surface; declivous; inclined; not level.
4. Headlong; running downward or headlong.
5. Inclined; propense; disposed; -- applied to the mind or affections, usually in an ill sense. Followed by to.