彼女は子供が無邪気に笑う姿を見て安心する

N5 彼女 kanojo she N5 子供 kodomo child, children N1 無邪気 mujaki innocence, simple-mindedness N4 笑う warau laugh, smile N3 姿 sugata figure, appearance, form N4 安心 anshin relief, peace of mind N5 する suru do, perform, try

N5 見 ken / mi.ru, mi.eru, mi.seru see, hopes, chances N4 安 an / yasu.i, yasu.maru, yasu, yasu.raka relax, cheap, low N4 心 shin / kokoro, -gokoro heart, mind, spirit

N5 〜が ga Marks the grammatical subject, highlights new information, can also show slight contrast in some sentences N5 〜を o Marks the direct object of an action, appears before the verb, shows what receives the action N5 〜に ni Indicates destination, target, arrival point, specific time, or person receiving an action N5 〜は wa Marks the topic of the sentence, indicates what the sentence is about, can contrast with another element, organizes main information