IPA: /ˈæftərwɜrd/
KK: /ˈæftərwərd/
At a later time or after something has happened.
We went to dinner, and afterward we watched a movie.
Afterward is formed from "after" (from Old English "æfter", meaning following in time or place) and "-ward" (meaning in the direction of or toward). The word "afterward" means in the time following an event or action.
Think of 'after' as something that comes 'following' an event, and '-ward' indicating direction — so afterward refers to what happens in the time that follows.