Antonyms of adj well-tried

1 sense of well-tried

Sense 1
tested, tried, well-tried -- (tested and proved useful or correct; "a tested method")

INDIRECT (VIA proved) -> unproved, unproven -- (not proved; "unproved allegations"; "unproved assumptions")

Similarity of adj well-tried

1 sense of well-tried

Sense 1
tested, tried, well-tried -- (tested and proved useful or correct; "a tested method")
       => proved (vs. unproved), proven -- (established beyond doubt; "a proven liar"; "a Soviet leader of proven shrewdness")