IPA: //ænˈtæɡəˌnaɪz//
KK: /æntæɡəˌnaɪz/
To cause someone to feel angry or hostile towards you by your actions or words.
His constant teasing began to antagonize his friends.
Past: antagonized
Past Participle: antagonized
Antagonize → It is formed from "anti-" (meaning against) and "agonizesthai" (meaning to struggle or contend). The word describes the act of causing someone to struggle or contend against you, hence creating opposition.
Think of 'against' ('anti-') and 'struggling' ('agonizesthai') to remember that to antagonize means to cause someone to struggle against you.