antipathy; hostility; ill feeling
A strong feeling of dislike or opposition toward a person, idea, or action. Often used with verbs like 買う (to incur), 抱く (to harbor), or 持つ (to have).
His rude attitude incurred everyone's antipathy.
その政策に対して強い反感を持っている。
I have strong hostility toward that policy.
I felt antipathy toward his arrogant attitude.
That remark provoked a lot of ill feeling.
The employees resented the new policy.
The residents showed strong antipathy toward the plan.
I couldn't help feeling antipathy at that comment.
反感 is a feeling of antipathy or resentment toward someone, the opposite of the warm understanding expressed by 共感.