由-able+-ity而，构成抽象名词，表示“可...性”、“易...性”、“可...”

knowability 可知性

changeability 可变性

readability 可读性

lovability 可爱

usability 可用性，能用

dependability 可靠性

movability 可移动性

preventability 可防止

inflammability 易燃性

adaptability 可适应性

【来源及含义】Latin: suffix; expressing ability, capacity, fitness, or "that which may be easily handled or managed"

【相关描述】Just a few examples out of hundreds of words presented as the noun forms of -able; forming nouns of quality from, or corresponding to, adjectives in -able; the quality in an agent that makes an action possible. The suffix -ible has related meanings.

【同源单词】absolute permeability, absorbability, accountability, achievability, acquirability, adaptability