transitive verb, intransitive verb
Origin: Fr concentrer < L com-, together + centrum, center
See concenter in American Heritage Dictionary 4
tr. & intr.v. con·cen·tered, con·cen·ter·ing, con·cen·ters
Origin:
Origin: Probably Italian concentrare
Origin: or French concentrer
Origin: : both from Latin com-, com-
Origin: + Latin centrum, center; see Center
.