Welcome to Unit Four. Unit 4 introduces principles for forming English derivatives chiefly from Greek adjectives. (Latin adjectives were covered in Unit 3.)

Piazza del Populo, Rome

The following topics are addressed:

• the basic concept of combining forms, and
• four general rules of derivation.

After exploring Unit 4, students should be able to infer the definitions of English words by recognizing predominant Greek (and some Latin) combining forms.