Noah Webster
Supine
SUPI'NE, adjective [Latin supinus.] Lying on the back, or with the face upward; opposed to prone.
1. Leaning backward; or inclining with exposure to the sun.
If the vine
On rising ground be plac'd on hills supine--
2. Negligent; heedless; indolent; thoughtless; inattentive.
He became pusillanimous and supine and openly exposed to any temptation.
These men suffer by their supine credulity.
SU'PINE, noun [Latin supinum.] In grammar, a word formed from a verb, or a modification of a verb.