IPA: //ˌæn.tiˈreɪ.dɑːr//
KK: /ˈæntiˌreɪdər/
Describing something that is designed to avoid being detected by radar systems.
The military vehicles were equipped with antiradar technology to enhance their stealth capabilities.
Antiradar is formed from "anti-" (meaning against) and "radar" (an acronym for Radio Detection and Ranging, which refers to a system that uses radio waves to detect objects). The word "antiradar" describes something that works against radar detection.
Think of 'against' ('anti-') something that detects ('radar') — that's why antiradar refers to technology that helps avoid radar detection.