Word: 留心 (liúxīn) 留心 dictionary entry liúxīn to be careful Full dictionary entry for 留心 Example sentences using 留心 2 sentences, showing page 1 of 1. 过马路要留心来往的车。 Guò mǎlù yào liúxīn láiwǎng de chē. Watch out for passing cars when you cross the road. 逛街时要留心你的手机。 Guàngjiē shí yào liúxīn nǐ de shǒujī. Keep an eye on your phone when you go shopping.