IPA: /ˈmuːn.wɜːrd/
KK: /mun-wərd/
In the direction of the moon.
The spaceship traveled moonward as it left Earth.
Moonward → It is formed from "moon" (from Old English *mōna*, meaning the moon) and "-ward" (meaning in the direction of). The word "moonward" means in the direction of the moon.
Think of the word 'moon' pointing to the celestial body and '-ward' indicating direction — so moonward means heading towards the moon.