恳
kěn
earnest
他用恳切的语气请求大家帮忙。
tā yòng kěn qiè de yǔ qì qǐng qiú dà jiā bāng máng。
he used an earnest tone to ask everyone for help.
她写了一封言辞恳切的信给老师。
tā xiě le yī fēng yán cí kěn qiè de xìn gěi lǎo shī。
she wrote a letter with earnest words to her teacher.