1) Dazzling 2) Striking as with lightning 3) Stunning 
Foudroyant has been the name of several ships, both British and French: ...
thundering; dazzling
Foudroyant describes a disease that occurs suddenly and with great severity.The Foudroyant was Nelson's flagship in 1798. In 1892 it was brought to the Thames with the intention of establishing a museum to Nelson, but that failed and the owner, J R Cobb restored the vessel and moored her at Woolwich and opened her to visitors. In 1896 at Blackpool she was wrecked by a gale, the crew were saved, and in 1897 she was finally ...
striking as with lightning; sudden and overwhelming in effect; stunning; dazzling. · (of disease) beginning in a sudden and severe form.