I. ̷ ̷| ̷ ̷| ̷ ̷ adverb
Etymology: below (II) + stairs
: downstairs
many works … kept belowstairs … are accessible only on demand — Denys Sutton
II. adjective
1. : on a lower floor
the servants' quarters are belowstairs
2. : common , unrefined
a belowstairs love affair