-  severa; severe
-  malcedema
- posta steveno; postaĵo; posta parto; pobo; malantaŭ(aĵ)o
- [Zamenhof's parents] were strangely incongruous. Marcus seemed to be all rational intellect, conscientious industry and stern discipline; Rosalie, his wife, born Rosalie Sofer, to be all love, patience and intuitive human understanding. 
-  Having a hardness and severity of nature or manner.
-  Grim and forbidding in appearance.