counteragent

About 0.01 uses per million words.

Meaning

1. noun An agent having the opposite effect; an antidote.
2. noun A spy working for the opposing side.

Similar words

antiantidote antidote counteractant counteracter counterpoison antiantitoxin antipoison antipathogen antidot antidotary

Often followed by

to against for

Word family

counter-agent counter-agents counteragents