underproof

/ˌʌndərˈpruf/
adjective
  1. Containing less alcohol than the standard proof (usually 100 proof or 50% alcohol by volume).
    • Some cheap liquors are underproof, so they taste weaker.
    • He checked the label and found the rum was underproof, at only 40 proof.
    • The distillery accidentally produced a batch of underproof whiskey.
Antonyms
What does "underproof" mean? | whatsthatwordmean | whatsthatwordmean