1to smile gently — a soft, quiet smile without laughing aloud
彼女は子供を見て優しく微笑んだ。
She looked at the child and smiled gently.
先生はうなずきながら微笑んで、生徒を安心させた。
The teacher nodded and smiled, putting the student at ease.
写真を撮るとき、自然に微笑むのは意外と難しい。
It's surprisingly hard to smile naturally when taking a photo.
彼はその写真を見て、懐かしそうに微笑んだ。
He looked at the photo and smiled fondly, as if reminiscing.