expert

Showing or involving the skill and knowledge of a highly trained person.

• We need expert advice.
• The repairs require expert knowledge.
• She gave an expert assessment of the damage.

Similar words: specialist, professional

Common phrases: expert advice, expert knowledge, expert opinion

Having great skill or knowledge because of training or experience.

• She is an expert swimmer.
• He became expert at repairing bicycles.
• These routes are suitable for expert climbers.

How to use it: expert at something/doing something (She is expert at fixing old radios.); expert in something (He is expert in local history.)

Similar words: skilled, proficient, accomplished

Opposites: unskilled, inexperienced

Common phrases: expert skier, expert player, expert at something, expert in something

A person who has great knowledge or skill in a particular subject or activity.

• Ask an expert.
• She is a leading expert on birds.
• The experts disagreed about the cause.

How to use it: expert in something (She is an expert in plant diseases.); expert on something (We consulted an expert on old coins.); expert at doing something (He is an expert at repairing clocks.)

Similar words: specialist, authority

Opposites: novice, amateur

Common phrases: an expert in, an expert on, consult an expert, ask an expert