偏心 means 'to be biased' or 'partial,' describing unfair favoritism toward one person or group, often in families, schools, or workplaces. The literal translation is 'off-center heart,' which captures the concept of unequal treatment. Note that in mechanical engineering 偏心 also refers to 'eccentric' (e.g., eccentric cam), but this technical noun sense is rare in everyday conversation and does not match the stative verb usage. As a stative verb, it typically appears with 对...偏心 (biased toward...).