Concentrate

To direct and keep one's attention on a chosen task, idea, or perception.

Reach for it when describing deliberate focus despite competing stimuli

A quiet booth helped Mara concentrate on the unfamiliar listening test.

• playful

  zero in

  attention narrows quickly onto a target

  not when The idiom suggests selection or pursuit rather than sustained concentration.

• everyday

  focus

  attention is directed toward one priority

  not when Focus can be momentary and also describes lenses, groups, or topic scope.

• warm

  immerse oneself

  deep absorption in an activity is the goal

  not when Immersion can be pleasurable and broad, without the control concentration requires.

• professional

  apply oneself

  disciplined effort toward work is central

  not when Application adds diligence and is awkward for simply noticing a sound.

• formal

  attend

  careful mental notice is being given

  not when Attend can mean being present or serving someone, which may confuse the sentence.

• literary

  fix one's mind

  deliberate sustained mental direction suits elevated prose

  not when The phrase sounds archaic and can imply rigid thinking.

• distract
• drift
• scatter

• concentrate fully

  She could concentrate fully once the machine's alarm was silenced.

• concentrate on

  Please concentrate on the dosage column rather than the package color.

• ability to concentrate

  Regular breaks protected his ability to concentrate.