concentrate

сосредото́читься

To focus one's thought or attention (on)

• We must concentrate on that.

  Мы должны сконцентрироваться на этом.

  Tatoeba · CK · CC BY 2.0 FR

• He concentrated on his studies.

  Он сосредоточился на учёбе.

  Tatoeba · CM · CC BY 2.0 FR

сосредото́читься

To bring to, or direct toward, a common center; to unite more closely; to gather into one body, mass, or force

сосредото́читься

To increase the strength and diminish the bulk of, as of a liquid or an ore; to intensify, by getting rid of useless material; to condense

сосредото́читься

To approach or meet in a common center; to consolidateредкое