expertise
/ˌɛkspɚˈtiːs/noun
A high level of skill or deep knowledge in a specific subject or activity.
Example sentences
- “Her expertise in tax law makes her a valuable adviser.”
- “We hired a consultant with expertise in data security.”
An uncountable noun: you have expertise, never 'expertises' or 'an expertise'. Usually followed by 'in': expertise in tax law.