koncentrera sig înseamnă în Engleză

concentrate [concentrated, concentrating, concentrates]▼(focus one's thought or attention)
verb
[UK: ˈkɒn.sən.treɪt] [US: ˈkɑːn.sən.ˌtret]

focus [focussed, focussing, focusses]▼(intransitive: to concentrate one's attention)
verb
[UK: ˈfəʊkəs] [US: ˈfoʊkəs]