I'm aware of the difference between Prone vs. Supine vs. Prostrate, but I'm trying to find the opposite of the related word 'reclined'.
Every web or dictionary search brings up 'upright' as the antonym for reclined. That's not what I mean.
Where I envisaged a reclined person (on their back/supine but propped up), I'm trying to find the word for lying on one's front in the prone position also propped up.
A good example would be the stereotype of Romans eating on their stomach:
Or this person reading while resting on a pillow:
Both pictures show them propped up, like a reclined person is, whether by pillows or use of their arms.
If I were to use it in a sentence, it might be:
Derrek's partner reclined on the sunlounger, in contrast Derrek <word>ed by the pool.
I don't want to use the word prone, as I'm not using the word supine; 'prone' would feel out of place. Prone also implies to me that their face is pointed directly down to the floor or close to it, in much the way that Supine implies to me facing directly upward.