English Suffixes and Typical Base Words
The suffix –proof can be attached to ‘base’ words which belong to the word class of nouns, e.g. water, fire, sound: waterproof, fireproof, soundproof. The suffix –ness can be attached to adjectives, e.g. damp, sad, happy: dampness, sadness, happiness. The suffix –able can be attached to verbs, e.g. read, accept,...