A / assensor
noun

assensor

gen. assensōris · gender masculine · decl. 3rd
he that assents to; agrees with
he that assents to or agrees with any one: cotidie commemorabam te unum in tanto exercitu mihi fuisse adsensorem, Cic. Fam. 6, 21; Auct. ad Her. 3, 23: vindictae, Val. Max. 6, 3, 6: irae, Sen. Hippol. 1207.