proficiency

Synonyms:

command, IQ, mastership, mastery.

Related Words:

accomplishment, advance, advancement, aptitude, competence, dexterity, efficiency, expertise, expertness, facility, headway, know-how, knowledge, learning, oil, savvy, skill, stuff, talent.

Origin:

1535–45; < Latin prōfici(ēns) proficient + -ency. —Dictionary.com. // First Known Use of proficiency: 1544. —Merriam-Webster.

Sources: 1, 2.

Added: 20 July 2020 {6:23 PM}