focus     
 N [foco] focus, focuses/foci

V ~ bring into ~
  These observations were brought into focus by X.

~ Prep ~ of | ~ on
  the focus of this study | a focus on embryos

 V [enfocar] focus, focuses/focusses, focusing/focussing, focused/focussed

~ N ~ attention
  We focus our attention on challenging issues.

~ Prep ~ on
  Our study focuses exclusively on children.