expertise

Etymology

Borrowed from French expertise.

noun

1. Great skill or knowledge in a particular field or hobby.
   The scientist has expertise in the field of nuclear fusion.
   He spoke of Scotland's hydroelectric projects in Africa, local expertise shared with the world's poor. 8 September 2014, Michael White, “Roll up, roll up! The Amazing Salmond will show a Scotland you won't believe”, in The Guardian
2. Advice, or opinion, of an expert.

verb

1. (transitive, rare) To supply with expert knowledge or advice.
   Since 1979, we have developed a method for expertising the design of the processes and improving them. 1985, Energy Research Abstracts, page 2720
   Including a plurality of different expertise in the decision-making processes corresponds to expertising the democratic procedures. 2010, Donald Gray, Laura Colucci-Gray, Elena Camino, Science, Society and Sustainability, page 20
   If experts shall lose their expertise, wherewith shall they be expertised? The fact that only the rare economists can be entrusted with economics is not reason to discard economics, but to go and find the rare men. 2011, Jens O. Parsson, Dying of Money, page 249