halfway
US /ˌhæfˈweɪ/
UK /ˌhæfˈweɪ/

1.
at the midpoint of a distance or period
:
•
We stopped halfway to the destination for a break.
•
She was halfway through her speech when the fire alarm went off.
1.
incomplete or partial
:
•
The project is still halfway done.
•
He gave a halfway apology, which wasn't very sincere.