supercautious

adjective

su·​per·​cau·​tious ˌsü-pər-ˈkȯ-shəs 

: extremely cautious

a supercautious driver

The youngish scientists represented here …. are supercautious about supercolliders—they know how easily data can be misinterpreted, how the lust for Nobel Prizes can derange good science.

—Peter Rainer

Word History

First Known Use

1808, in the meaning defined above