Suffixes:

We can make many NOUNS in the following ways
e.g. over- + eat(v.) =overeat
+ kind(adj.) +-ness +kindness(n.)
(v.) + -ment e.g. improvement 舉例二個
(v.) + -tion/-sion e.g. subtraction 舉例二個
(v.) + -ation/ition e.g. organization 舉例二個
(v.) + -er/-or e.g. actor 舉例二個
(adj.) + -ness e.g. darkness 舉例二個
(adj.) + -ity e.g. density 舉例二個
We can make many ADJECTIVES like this:
(v.) + -ive e.g. attractive 舉例二個
(v.) + -ative/itive e.g. sensitive 舉例二個
(v.) + - able/ible e.g. readable 舉例二個
(v.) + - ful e.g. careful 舉例二個
(adj.) + - less e.g. useless 舉例二個