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expertise

UK/ˌɛkspɜːˈtiːz/US/ˌɛkspɚˈtis/
nounB2Common in everyday speech and writing · #4,154 of 15,258leans written

Expertise is deep skill and knowledge in one field. Years of it, and it shows in the details.

It is a mass noun, so you have expertise rather than expertises, and it takes in. The word is more formal than skill and narrower than knowledge, since expertise is always about a particular area. Note the ending, which is -ise in both British and American English, since it is not one of the verb endings that vary. The person is an expert, and the adjective expert doubles as one.

Becker von, Adolf (1831 - 1909) (Finnish) Details on Google Art Project · Public domain

Definitions of expertise

  1. 1nounexpertiseDeep skill and knowledge in a particular field.B2

    “They brought in outside expertise for the survey.”

Where it comes from

  1. French

    expertise

  2. English, today

    expertise

Borrowed from French expertise. Compare gourmandise.

Etymology from Wiktionary, CC BY-SA

Practised in A Man Called Ove

First appears in chapter 9 of A Man Called Ove.

Practise this word

expertise in the wild

  • The Common Corps of the Armed Forces are Spanish military corps that are shared by all the branches of the Spanish Armed Forces providing specific professional expertise.

    Common Corps of the Spanish Armed Forces

From Wikipedia, CC BY-SA 4.0. These sentences were written by other people about their own subjects; they are here to show the word at work, not as anybody’s opinion.