From Middle English shǒnen (“decline to do, avoid, fear”), from Old English scunian, possibly ultimately from Proto-Indo-European *(s)kewdʰ- (“to cover, wrap, encase”), from *(s)kew- (“to cover, hide”); if so, cognate with Old English hȳdan (“to hide, conceal, preserve”).
shun (third-person singular simple present shuns, present participle shunning, simple past and past participle shunned)
- (transitive) To avoid, especially persistently.
- (transitive) To escape (a threatening evil, an unwelcome task etc).
- (transitive) To screen, hide.
- (transitive) To shove, push.