便宜 (pián yi): ถูก; ราคาถูก; ผลประโยชน์เล็กน้อย; ผ่อนผันให้; สะดวก

This piece of clothing is very cheap, so I bought it.

Don't always try to take advantage of others.

Things bought just because they are cheap are often of poor quality.

I'll let you off lightly this time.