-able
/əbl/suffix
forming adjectives meaning［构成形容词］
1
- able to be表示“能…的”, “可…的”：
calculable.
2
- due to be表示“应…的”：
payable.
3
- subject to表示“易于…的”, “需要…的”：
taxable.
4
- relevant to or in accordance with表示“与…有关的”, “与…相符的”：
fashionable.
5
- having the quality to表示“具…特点的”：
suitable
comfortable.
词源
from French -able or Latin -abilis; originally found in words only from these forms but later used to form adjectives directly from English verbs ending in -ate, e.g. educable from educate; subsequently used to form adjectives from verbs of all types （influenced by the unrelated word ABLE）, e.g. bearable, saleable.