IPA: /ˈsaɪd.wɚd/
KK: /ˈsaɪd.wɚd/
In a direction that is to the side or away from the center.
The cat moved sideward to avoid the dog.
Sideward → It is formed from "side" (from Old English "side", meaning the lateral part of something) and "-ward" (meaning in the direction of). The word "sideward" means in the direction of the side.
Think of moving "in the direction of the side" — that's what sideward means.