straighten
🇺🇸
/ˈstreɪtn/
🇬🇧
/ˈstreɪtn/
to make something not bent or curved
Please straighten the picture on the wall so it looks level.
请把墙上的画弄直,让它看起来水平。
to stand or sit with your back straight
Straighten your back when you sit at the desk.
坐在桌子前时挺直你的背。