1. Not having a coating of stain or varnish
   - unstained 
2. Free from any effort to soften to disguise
   "the plain and unvarnished truth"; "the unvarnished candour of old people and children"
   - plain

See also: direct, unpainted

• Ulvales
• Ulvophyceae
• Ulysses
• Ulysses Grant
• Ulysses S. Grant
• Ulysses Simpson Grant
• um
• Uma
• Uma notata
• umami
• Umar al-Mukhtar Forces
• Umayyad
• white wine
• white wolf
• white woman
• white wood aster
• white yam
• white zinnia
• white-alder family
• white-bellied swallow
• white-berry yew
• white-blotched
• white-breasted nuthatch
• white-chinned petrel
• white-coat hypertension