(un-, prefix1 affix 1.)

having a healthy chest; (figurative) bold, loyal (cf. chest, n.1 9b).

Having good, healthy, or abundant blood; esp. (a) having a high colour, rosy; (b) of good stock or lineage. Obsolete.

Of a function of the body, esp. evacuation of the bowels or menstruation: occurring at uniform intervals or at a predictable time. Also: (of an…

Clear of inequalities or unevennesses, clean-cut.

Capable of digesting; having good digestion; = eupeptic, adj. 2. Obsolete.

Having a good digestion.

Medicine. Of a valve or sphincter: functioning normally; able to prevent reflux. Opposed to incompetent, adj. 2b.