U / unguen
noun

unguen

gen. unguĭnis · gender neuter · decl. 3rd
a fatty substance; fat; an ointment; unguent
a fatty substance, fat; an ointment, unguent: in aënum caldum unguen indito, Cato, R. R. 79; 80: pingues unguine ceras, Verg. G. 3, 450: cras. sum, Pers. 6, 40: pingue, Val. Fl. 6, 360; 8, 302 al.