unmalted
Adjective
Meaning
of grain that has not been converted into malt
Source: WordNetAntonyms
Examples
unmalted barley
More recently, 'stout' tends to be used to describe dry stouts, (containing a small amount of unmalted roast barley), or sweet stouts, (such as milk stouts), whilst 'porter' describes a beer flavoured with roast malted barley.
Some have roasted unmalted barley.