To shun is to ignore, avoid or reject someone or something.
When you continually avoid and ignore someone, this is an example of a situation where you shun that person.
To avoid using, accepting, engaging in, or partaking of.
Shun someone's advice; shun public recognition; shun fatty foods.
To refuse to accept socially; avoid having social contact with.
To stay away from; not go to.
To keep away from; avoid scrupulously or consistently, often, specif., as a practice by a group against a co-worker, coreligionist, etc. who has fallen out of favor.
Origin of shun
From Old English scunian. Cognate with Old Norse skunde/skynde (“to hasten”).