adverb / adjective
halfway
haf-WAY/hˈæfwˈeɪ/
At or roughly at the middle of a distance or process.
The walker stands halfway along the path between the matching posts.

Etymology
Half plus a path or course gives the image of reaching the middle of a journey, also applicable to partial progress between other limits.
In context
going halfway into the water and connecting the motions
More examples
- We are halfway through the movie.
- At the halfway point, the runners stop for water.
- She pauses halfway up the stairs to catch her breath.