Verba aequivoca ac in dubio sensu posita
Verba aequivoca ac in dubio sensu posita, intelliguntur dignori et potentiori sensu. Equivocal words and those in a doubtful sense are to be taken in their best and most effective sense. 6 Co. 20.
A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.