To avoid something. (Cambridge Dictionary)
To ignore someone and not speak to that person because you cannot accept their behaviour, beliefs, etc: (Cambridge Dictionary)
To avoid deliberately and especially habitually. (Merriam – Webster)
To keep away from (a place, person, object, etc.), from motives of dislike, caution, etc; take pains to avoid. (Dictionary.com)
Persistently avoid, ignore, or reject (someone or something) through antipathy or caution. (Oxford Dictionaries)
Japan’s 4 carriers to shun Chinese 5G tech.
U.S. asks allies to shun Huawei equipment, WSJ reports; sector stocks fall.