Definitions
not drawn upon or used
Word origin
From un- + tapped.
Used in a sentence
“The author kindly welcomes notification of any terms overlooked, any antedatings of earliest attestations, and any untapped sources that may prove to be productive.”
“If 90% (often quoted) of the UK public don't use trains regularly, there is a huge untapped potential market for securing extra passengers.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Not yet used”8 letters
Not quite right?
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U_______