beginningside

noun
UK /bɪˈɡɪnɪŋsaɪd/
US /bɪˈɡɪnɪŋsaɪd/

The beginningside is the part where something starts.

We walked to the beginningside of the trail and began our hike.


OTHER MEANINGS

2. The first part of a story or game.

At the beginningside of the book, we meet the main character.

3. The side where a line or path starts.

Stand at the beginningside of the race line.

4. The early time of a project.

The beginningside of the project was the most exciting.