repulse + -ion

1. a feeling of intense distaste or disgust:

〖時にa ～〗 嫌悪, 反感

e.g. people talk about the case with a mixture of fascination and repulsion.

2. Physics a force under the influence of which objects tend to move away from each other, e.g. through having the same magnetic polarity or electric charge:

〘物理〙 反発作用(↔ attraction)

e.g. bond lengths are increased due to increasing repulsion between the atoms.