Biased means leaning unfairly towards one side. A biased report, biased against them, heavily biased.
It is an accusation about the process rather than the conclusion, since a biased method can still reach a true answer by luck. In statistics it is precise: a biased estimator is one that is wrong on average.
1adjectivebiasedLeaning unfairly towards one side.
“The referee was accused of being biased towards the home team.”
biased is a quality.
Vulgar Latin
*biaxius — with two axes
Old Occitan
biais
Middle French
biais
English
bias
English, today
biased
From bias + -ed. bias c. 1520 in the sense "oblique line". As a technical term in the game of bowls c. 1560, whence the figurative use (c. 1570). From Middle French biais, adverbially ("sideways, askance, against the grain") c. 1250, as a noun ("oblique angle, slant") from the late 16th century. The French word is likely from Old Occitan biais, itself of obscure origin, most likely from Vulgar Latin biaxius (“with two axes”).
Etymology from Wiktionary, CC BY-SA