concentrate
verb [ I or T ]
uk/ˈkɒnsəntreɪt/ usto give all of your attention to one particular activity, subject, or problem:
concentrate on sth The corporation is selling off its restaurant chain to concentrate on its core retailing business.
concentrate on doing sth The new firm will concentrate on managing money for institutional investors.
concentrate your efforts/attention/resources on sth Many wine producers have concentrated their efforts on producing less wine, but of a higher quality.