enable

To make somebody able (to do, or to be, something); to give sufficient ability or power to do or to be; to give strength or ability to.

And I thank Christ Jesus our Lord, who hath enabled me, for that he counted me faithful, putting me into the ministry; who was before a blasphemer, and a persecutor, and injurious: but I obtained mercy, because I did it ignorantly in unbelief.

To affirm; to make firm and strong.

To qualify or approve for some role or position; to render sanction or authorization to; to confirm suitability for.

This was widely interpreted to mean that slavery was once more firmly illegal in England. However, the "positive law" mentioned–i.e., a direct law specifically enabling slavery–existed in many British colonies (although not all), since these colonies had a degree of freedom to write their own law apart from that of the home country.

To yield the opportunity or provide the possibility for something; to provide with means, opportunities, and the like.

Temperance gives Nature her full play, and enables her to exert herself in all her force and vigor.

April 16, 2018, Norimitsu Onishi and Selam Gebrekidan writing in The New York Times, ‘They Eat Money’: How Mandela’s Political Heirs Grow Rich Off Corruption

To imply or tacitly confer excuse for an action or a behavior.

His parents enabled him to go on buying drugs.