partial, side, left-side radical, inclining, biased
偏 centers on leaning to one side: being partial, biased, or inclined toward something. The radical sense is the same left-side person radical used as a component in other characters.
偏 combines the person radical 亻 with 扁, which likely contributes the sound and the idea of flatness or one-sidedness, suggesting a person leaning or biased.
A person 亻 standing beside a flat, one-sided object 扁: imagine someone leaning against a signboard, tilting to one side. That leaning is being partial or biased.
For ヘン, picture a hen leaning to one side as it pecks at grain: hen -> ヘン, and the hen's tilted posture shows bias.
prejudice; bias; distorted view
deflection; deviation; variation; declination; drift
to lean (to one side); to incline
deviation; inclination; offset; bias; prejudice
imperfect; incomplete; unsatisfactory
left-hand radical of a character
propensity; tendency; inclination; deflection
migraine
attaching too much importance to; placing disproportionate emphasis on; making too much of
favoritism; favouritism; partiality
unbalanced diet
narrow-minded; obstinate; stubborn; perverse; unreasonable; warped; bigoted; eccentric
wholly (due to); entirely; solely
uneven distribution; unfair distribution; maldistribution
bias; eccentricity; obstinacy
narrow-mindedness; intolerance; illiberality; narrowness
westerlies; prevailing westerlies
kanji "going man" radical (radical 60)
monomania; monomaniac
kanji "direction" radical at left (radical 70)