Adjektive
fresh {air, water, etc.}, [ fresher ; freshest]
pure [ purer/more pure ; purest/most pure ]
clean [ cleaner ; cleanest]
clear [ clearer ; clearest]
undefiled [ more undefiled ; most undefiled ]
unsullied [ more unsullied ; most unsullied ]
Verb
to refine [ refined ; refined ] , {chem.}
to winnow [ winnowed ; winnowed ]
Noun
marrow [pl. marrows] , {medulla}, {zool.}
medulla [pl. medullas / medullae] , {biol.}
...
