work-brittle
/ˈwəːkˌbrɪtl/English regional (now rare ) and United States regional (chiefly Midland )
adjective
Eager to work, industrious, energetic.
Origin
Mid 17th century; earliest use found in John Trapp (1601–1669), Church of England clergyman and writer on theology. From either work or work + a second element of uncertain identity.