-able , -ible suffix (in adjectives)
1.
that can or must be :
calculable
taxable
2.
having the quality of :
fashionable
comfortable
changeable
► -ability , -ibility (in nouns):
capability
responsibility
► -ably , -ibly (in adverbs):
noticeably
incredibly
••
WORD ORIGIN
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 ; later used to form adjectives from verbs of all types (influenced by the unrelated word able ), e.g. bearable , saleable .