Part of speech: Verb
oppose and mitigate the effects of by contrary actions
Example: This will counteract the foolish actions of my colleagues
Categories: Cancel, Offset, Set off
Antagonise, Countermine, Sabotage, Weaken, Undermine
counter – A related word in the same word family.
act – A related word in the same word family.
English spelling is irregular because it preserves pronunciations from multiple historical periods simultaneously.