Definition of go-aheadative in US English:
go-aheadative
(also go-aheaditive)
adjective
US
rare, informal
Displaying or characterized by initiative and energy.
Origin
Mid 19th century. Partly from to go ahead + -ative.
Pronunciation
go-aheadative
/ˌɡəʊəˈhɛdətɪv/