R / rēsponsus
noun

rēsponsus

gen. rēsponsūs · gender masculine · decl. 4th
respondeo, II. B..
An answer; reply
An answer, reply (opp. interrogatio), Dig. 44, 7, 1, § 7.—
Correspondence of parts; harmony; symmetry
Correspondence of parts, harmony, symmetry, Vitr. 1, 2; 3, 1.