Suffixes: -able, -ible, -ious, -ous

This vocabulary skills unit for grade 5 presents activities in which students add a suffix to a base word that changes the word's meaning and part of speech (-able and -ible mean "likely to," -ious and -ous mean "full of/possessing the qualities of": predict + able = predictable or "can be predicted"). Written in three levels of difficulty. Includes answer key.