keep to
phrasal verbPart ofkeep
keep to — phrasal verb
1. to stay within a particular limit or plan, or to follow a rule or agreement
1.phrasal verb
Definition
to stay within a particular limit or plan, or to follow a rule or agreement
Example
Please keep to the path so you do not damage the plants in the nature reserve.
The speaker did not keep to the topic and talked about many unrelated things.