"Expertness" is a word in ENGLISH
expertness
ENGLISH
Definition:
Skill derived from practice; readiness; as, expertness
in seamanship, or in reasoning.
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What did General Patton do on Thanksgiving? He gave tanks.
experimental
ENGLISH
Pertaining to experiment; founded on, or derived from, experiment or trial; as, experimental science; given to, or skilled in, experiment; …
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ENGLISH
Not expert; not skilled; destitute of knowledge or dexterity derived from practice.
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ENGLISH
Derived from practice; as, practical skill.
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ENGLISH
One who has long acted on the stage of life; a practitioner; a person of experience, or of skill derived …
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