IPA: /ˌæntiˈnjuːtrɒn/
KK: /æntiˈnjuːtrɒn/
A particle that is the opposite of a neutron, having the same mass but a positive charge.
In particle physics, the antineutron is studied to understand the properties of antimatter.
Antineutron → It is formed from "anti-" (meaning against or opposite) and "neutron" (from Greek "neutron", meaning neutral). The word "antineutron" refers to a particle that is the opposite of a neutron, having the same mass but opposite properties.
Think of 'anti-' meaning against or opposite, and 'neutron' meaning neutral — together they describe a particle that is the opposite of a neutral particle.
No commonly confused words.