infulminate

From in- +‎ fulminate.

infulminate

1. (transitive, rare) To make something thunderous.
   • 1808, J. Barlow Columb. III. 20

     where […] suns infulminate the stormful sky

• John A. Simpson and Edmund S. C. Weiner, editors (1989), “infulminate”, in The Oxford English Dictionary, 2nd edition, Oxford: Clarendon Press, →ISBN.