expertise

noun

1. (countable, uncountable)Great skill or knowledge in a particular field or hobby.

   “He spoke of Scotland's hydroelectric projects in Africa, local expertise shared with the world's poor.”

   “Two HIV-positive teens, Jennifer Jako and Rebecca Guberman, had decided to make a film out of their own and other teens' experience with HIV, although they had no expertise when they started.”

2. (countable, uncountable)Advice, or opinion, of an expert.

verb

1. (rare, transitive)To supply with expert knowledge or advice.

   “Since 1979, we have developed a method for expertising the design of the processes and improving them.”

   “Including a plurality of different expertise in the decision-making processes corresponds to expertising the democratic procedures.”

   “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.”