悉心

tā xī xīn zhào liào tā bìng tà shang de qī zi

他悉心照料他病榻上的妻子。

He is taking the utmost care of his wife who is confined to sickbed.

xī xīn yán jiū

悉心研究

devote oneself to the study of something

hái zi men zài tā men de fù qīn xī xīn kān hù xia wán shuǎ

孩子们在他们的父亲悉心看护下玩耍。

The children played under the watchful eye of their father.