probability
UK[ˌprɒbəˈbɪləti]US[ˌprɑːbəˈbɪləti]
n
The measure of how likely something is to happen.
n
A thing that is likely to happen or be the case.
Morpheme Breakdown
prob
ability
prob
test, prove
ability
state or quality
Etymology
The word "probability" originates from the Latin term 'probabilitas', which itself derives from 'probabilis', meaning "provable" or "credible." The root 'prob-' stems from the verb 'probare', signifying "to test, prove, or approve." The suffix '-ability' transforms the adjective into an abstract noun denoting a state or quality. Thus, the literal historical meaning is "the quality of being provable or worthy of approval," which evolved through medieval Latin scholarship and early mathematical theory to signify the measurable likelihood of an event, shifting the focus from philosophical credibility to quantitative chance.
Analysis
Structure: prob (test, prove) + ability (state or quality)
- prob: From Latin 'probare' (to test, prove, approve). Functional role: root conveying the core meaning of testing or proving.
- ability: From Latin '-abilitas', a suffix forming nouns indicating a state, condition, or quality. Functional role: suffix forming an abstract noun.
Examples
The probability of rain tomorrow is very high.
There is a strong probability that the project will be completed on schedule.
In theory, any outcome has a calculable probability.