Focus

v.capable, calmprofessional

Meaning 1

To direct attention or effort toward a chosen subject.

Reach for it when describing deliberate concentration or priority-setting

The team will focus on restoring drinking water before repainting the hall.

playful
zero in on
attention narrows quickly to one target
not when Zero in on sounds conversational in policy or research reports.
everyday
attend to
careful notice or practical care is required
not when The phrase can imply responding to a need rather than selecting a central aim.
professional
concentrate
sustained mental attention is the main action
not when Concentrate sounds inward and may not cover allocating a team's resources.
professional
prioritize
one task must come before competing work
not when Prioritizing ranks work; it does not ensure close attention during execution.

To adjust an optical system until an image becomes clear.

Reach for it when describing the literal act of sharpening an image

Niko focused the camera on the maker's mark beneath the bowl.

everyday
sharpen
the visible image is being made clearer
not when Sharpen may also mean digital enhancement rather than optical focusing.
professional
adjust
changing the controls is the concrete action
not when Adjustment may alter exposure or position without improving focus.
professional
clarify
the desired result is greater visual intelligibility
not when Clarify concerns explanation; it does not specifically sharpen visual or mental focus.
formal
resolve
fine visual detail becomes distinguishable
not when Resolve is technical and can be mistaken for solving a problem.

The definition and the example on this page are written here. The dictionaries above ground which meaning is being described, not the wording.