to drive (something) back or away
to cause aversion in; to disgust
to drive (somebody) away
Foul words and frowns must not repel a lover — Shakespeare
to be incapable of sticking to, mixing with, or absorbing another substance taking up, or holding (something)
said of a magnetic pole or an electric field: to tend to force (e.g. another magnet) away or apart by mutual action at a distance
to cause aversion or disgust in (somebody)
[Middle English repellen from Latin repellere, from re- + pellere to drive]