I. ˈrānz noun plural
Etymology: Middle English reins, from Middle French & Latin; Middle French reins, from Latin renes
1. : kidneys
cleaveth my reins asunder — Job 16:13 (Authorized Version)
2. : the region of the kidneys : loins
girdled about the reins with a curse — A.C.Swinburne
3. : the seat of the feelings, affections, or passions
my reins also instruct me — Ps 16:7 (Authorized Version)
searcheth the reins and hearts — Revelations 2:23 (Authorized Version)
4. : the parts of a vault between the crown and the spring or abutment including the filling behind the vault shell
II.
plural of rein
present third singular of rein