Proficiency

Part of speech: noun

Pronunciation: /pɹəˈfɪʃənsi/

Definitions

1. A high degree of skill or expertise in a particular activity, subject, or language
2. A level of competence or skill that signifies mastery in a specific field, task, or form of communication
3. An advanced ability to perform effectively in a particular area, demonstrating thorough knowledge and expertise

Etymology: "Proficiency" is built from "proficient" plus the suffix "-ency," and the trail behind it leads to the Latin verb "proficere," meaning "to make progress" or "to go forward." That verb combined "pro-" (forward) with "facere" (to make or do), so its original sense is literally making headway. The Latin present participle "proficiens" gave rise to the adjective "proficient," which English took up for someone advancing in a skill. The noun "proficiency" follows the same pattern as words like "efficiency" and "consistency," formed by adding "-ency" to an adjective ending in "-ent" to name the quality or state it describes. So the noun names the state of having advanced far enough in a skill to do it well. Its meaning has stayed close to its Latin roots: the idea of progress is still embedded in the word, even though it now describes a finished level of competence rather than the act of moving forward.

Synonyms: skill, competence, expertise, ability, capability

Antonyms: incompetence, ineptitude, failure, inability, weakness