折 zhé / shé — broken (as of rope; stick); tenth (in price); to break; to fold; to turn
他把信纸对折了一下,放进信封。Tā bǎ xìn zhǐ duì zhé le yí xià, fàng jìn xìn fēng.He folded the letter paper and put it into the envelope.
Common words: 打折 (dǎ zhé)、折扣 (zhé kòu)、折磨 (zhé mó)