IPA: //ˌæn.tiˈsoʊ.lər//
KK: /ˈæntiˌsoʊlər/
Referring to a position or direction that is opposite to the sun, typically used in the context of astronomy or geography.
The antisolar point is the location in the sky directly opposite the sun.
Antisolar is formed from "anti-" (meaning against) and "solar" (from Latin "solaris", meaning of the sun). The word describes something that is opposite to or away from the sun.
Think of 'anti-' meaning against and 'solar' relating to the sun — so antisolar refers to something that is against or opposite to the sun.
No commonly confused words.