Derivational Suffixes

There are suffixes that change the meaning of the base word or stem. These are called derivational suffixes, and some common examples are:

-able
-ible (capable of being)
-ation
-sion
-tion (state of being)
-ful (notable for)
-fy (make or become)
-ify (make or become)
-ily
-ise
-ize (become)
-ism (belief or doctrine)
-ist (one who)
-ity
-ty (having the quality of)
-ment (condition or result of)
-ness (state of being)

Derivational suffixes can combine with each other, too, but the spelling may change (as in predictability, which is predict combined with -able and -ity).