Synonyms of interfere

Verb

1. interfere, impede, hinder

usage: come between so as to be hindrance or obstacle; "Your talking interferes with my work!"

2. intervene, step in, interfere, interpose, interact

usage: get involved, so as to alter or hinder an action, or through force or threat of force; "Why did the U.S. not intervene earlier in WW II?"

Definition and meaning of interfere (Dictionary)