noun / verb
coach
KOHCH/kəʊtʃ/
A person who trains others to improve their performance, or the act of doing so.
The coach demonstrates shooting form while the player holds the basketball.

Etymology
The carriage meaning behind coche supplied a metaphor for a tutor who “carries” a student through an exam. This instructional sense then extended to a person who trains athletes.
In context
the one guy, in particularly who was a volunteer coach, he took me under his wing, and coached me along through my running. I was very slow, but the longer we went, the better I got
More examples
- She coached the debate team through its first season.
- Our coach encourages us to review every mistake.
- He has coached young swimmers for many years.
Forms
coach · coaches · coached · coaching
coaching noun — Training that helps improve performance.