concentrate

verb

Focus all one's attention on a particular object or activity.

noun

A substance made by removing or reducing the diluting agent; a concentrated form of something.

SYNONYMS

apply oneself tobe absorbed inbe engrossed inbe immersed inbring to bearcentralizecentreconsider closelycudgel one's brains about/overdevote oneself todirectfocusfocus onfocus one's attention onget down toget stuck intohome in onkeep one's mind onpay attention toput one's mind torack one's brains about/overthink about closelyzero in on