Meaning of -ABLE in English

-ABLE

-able /əb ə l/ BrE AmE ( also -ible ) suffix [in adjectives]

[ Language: Old French ; Origin: Latin -abilis , from -bilis 'capable or worthy of' ]

1 . that you can do something to:

washable (=it can be washed)

unbreakable (=it cannot be broken)

loveable (=easy to love)

2 . having a particular quality or condition:

knowledgeable (=knowing a lot)

comfortable

—-ably /əbli/, -ibly suffix [in adverbs] :

unbelievably

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.