Definition: lying face downward
Similar words: unerect
Definition: not upright in position or posture
Synonyms: prone
Definition: having a tendency (to); often used in combination
Usage: a child prone to mischief; failure-prone
Similar words: inclined
Definition: (often followed by `to') having a preference, disposition, or tendency
Usage: wasn't inclined to believe the excuse; inclined to be moody