他应了一声。
He answered with a sound.
应
to answer; to respond; to comply with
Watch it being written
Every character draws itself, stroke by stroke. Then grab the brush: trace it yourself and hear the word when you finish.
应
Nice writing!
Build with these blocks
Chinese words snap together like bricks. Every word below shares a character with this one, so you are already halfway to knowing it.
See it in sentences
敲门有人应吗？
Does anyone answer the door?