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focus

In Canadian usage, the verb focus may be spelled with a single or double s before a suffix.

  • As a forensic scientist, Rosalind focuses (or focusses) on minute details.
  • The speaker was having trouble focusing (or focussing) his thoughts during the noisy demonstration.
  • Barbara Cass-Beggs focused (or focussed) on the musical abilities of young children.

The correct phrasal verb is focus on, and not the logically unsound focus around.

  • The RCMP investigation focused on (not around) the misuse of public funds.

The plural of the noun is focuses or foci (generally encountered in the sciences).

  • The political campaign organizers identified three potential focuses before the election.
  • A circle has one central point, but an ellipse has two foci.

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