Usage patterns
感情を抑えるto hold back/suppress one's emotions
He suppressed his anger and spoke calmly.
感情が高まるfor one's emotions to rise/intensify
As the match went on, the crowd's emotions rose.
感情を表すto show/express one's emotions
She's a person who doesn't show much emotion.
感情に流されるto be swept away by one's emotions
It's important not to be swept away by emotion in order to make calm judgments.
感情を込めるto put feeling/emotion into something
She sang the song with deep emotion.