Primarily means mainly or mostly. It refers to something being the main factor or the primary cause of a particular phenomenon.
Related terms
secondary: Something that is secondary comes after or is less important than something else. For example, in a movie, the main character's story may be primary, while the supporting characters' stories are secondary.
dominantly: If something happens dominantly, it means it occurs with great strength or influence. For instance, if a sports team wins dominantly, it means they win by a large margin and show their superiority over their opponents.
predominantly: When something is predominantly present or prevalent, it means it exists in greater amount or frequency compared to other things. For instance, if an area has predominantly sunny weather, it means there are more sunny days than cloudy days in that region.