verb
render
REN-der/ˈrendər/
To cause someone or something to be in a particular state.
The rain renders the paper umbrella unusable.

Etymology
The ancestor rendre covered giving back, presenting, and yielding. English extended this verb to producing a state or result: to render something useless is to cause it to be useless.
In context
Following volcanic activity, ash can block out enough light to render the moon a darker red, or even near black.