pantherine
/ˈpanθərʌɪn/ /ˈpanθərɪn/adjective
Resembling or characteristic of a panther; dark or spotted like a panther; powerful, lithe, graceful.
Origin
Mid 17th century; earliest use found in Thomas Blount (1618–1679), antiquary and lexicographer. From classical Latin panthērīnus of a leopard or similar animal, having markings typical of such an animal from panthēra + -īnus.