What is the difference of 偏 and 偏偏？

偏 (piān):
Meaning: It generally means "biased" or "inclined towards one side" and is often used to indicate a tendency or preference.

Usage: For example, you might say someone is 偏向 (piān xiàng) a particular opinion, meaning they are inclined towards that opinion.



偏偏 (piān piān):
Meaning: This is an intensifying expression. When 偏 is doubled, as in 偏偏, it often adds emphasis to the idea of something happening unexpectedly or contrary to what might be expected.

Usage: For instance, if someone is trying to avoid a certain situation, and that exact situation happens despite their efforts to avoid it, you could say 偏偏发生了 (piān piān fāshēng le), meaning "unexpectedly, it happened."