The adjective is 'capable'.

Type in the noun form:

Question

The adjective is 'capable'.

Type in the noun form:

BlackTom AI · Accepted Answer

From the adjective "capable" two standard and correct noun forms are "capability" and "capacity."

1. Relevant knowledge points and concepts
- Derivation: Many English adjectives form nouns by adding suffixes like -ity (capable → capability). Some nouns come from the same Latin root through a different historical pathway (capable ← capax → capacity).
- Semantics: Both nouns denote "ability" but with different typical uses: capability emphasizes potential, skill, or function; capacity often denotes maximum amount, volume, or role/ability in a quantitative or situational sense.

2. Step-by-step reasoning process
- Start with the adjective: capable.
- Form the -ity noun: attach -ity to the stem (capable → capability). This is a regular derivational pattern (adjective + -ity → noun indicating state or quality).
- Recognize the historical/lexical variant: capacity derives from Latin capax/capacitās and is used in English as the noun corresponding to capability in many contexts (capability ↔ capacity).

3. Intermediate steps and morphological detail
- capable (adjective) → remove final -e (orthographic step implicit) and add -ity → capability.
- The separate etymological path: Latin capax → Old French/Latin derivative → capacity. No complex arithmetic here, but the morphological steps show both outputs are valid nouns connected to "capable."

4. Why the correct answers are correct
- Capability: directly formed and widely used to mean "the quality or state of being capable" (e.g., "Her capability in research is clear").
- Capacity: used for "ability or power to do something" and also for measurable limits (e.g., "The theater's seating capacity is 300"; "He has the capacity to learn quickly").

5. Why other possible forms are incorrect
- Forms like "capableness" or "capablety" are not standard English; "ability" is related but is not the direct noun form of "capable" in morphological terms (ability has a different root).

6. Conclusion
Both "capability" and "capacity" are correct noun forms of "capable." This matches the provided answers: capability, capacity.

The adjective is 'capable'. Type in the noun form: Short answer

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