in a supine way, with the head facing up

Lying on its back. / (figuratively) Reluctant to take action due to indifference or moral weakness; apathetic or passive towards something.

(grammar, also attributively) In Latin and other languages: a type of verbal noun used in the ablative and accusative cases, which shares the same stem as the passive participle.

Third-person singular simple present indicative form of supinate

present participle of supinate

The act or state of lying face upward, on one's back. / (anatomy) The act of rotating the forearm so that the palm of the hand is turned up or forward, or the resulting state of the forearm

the state of being supine / Total submissiveness; flat on one's back, lacking any backbone; with total abandon; prostrate; supine

(transitive, anatomy) To twist the forearm so as to turn the palm of the hand backwards if the forearm is pointing up, upwards if the forearm is horizontal, or forwards if the arm is pointing down; to twist the forearm by contracting the biceps brachii; to twist the right forearm clockwise or the left forearm counterclockwise.

simple past tense and past participle of supinate

(anatomy) Having one's hand and forearm rotated so that the palm faces in the same direction as the interior angle of the elbow, thereby contracting the biceps brachii.