R. S. Ginzburg, S. S. Khidekel, G. Y. Knyazeva, A. A. Sankin a course in modern english

§ 5. Morphemic Types of Words

According to the number of morphemes words are classified into monomorphic

and polymorphic. Monomorphiс or root-words consist of only one root-morpheme, e.g. small, dog, make, give, etc. All pоlуmоrphiс words according to the number of root-morphemes are classified into two subgroups: monoradical (or one-root words) and polyradical words, i.e. words which consist of two or more roots. Monoradical words fall into two subtypes: 1) radical-suffixal words, i.e. words that consist of one root-morpheme and one or more suffixal morphemes, e.g. acceptable, acceptability, blackish, etc.; 2)radical-prefixal words, i.e. words that consist of one root-morpheme and a prefixal morpheme, e.g. outdo, rearrange, unbutton, etc. and 3) prefixo-radical-suffixal, i.e. words which consist of one root, a prefixal and suffixal morphemes, e.g. disagreeable, misinterpretation, etc.

Polyradical words fall into two types: 1) polyradical words which consist of two or more roots with no affixational morphemes, e.g. book-stand, eye-ball, lamp-shade, etc. and 2) words which contain at least two roots and one or more affixational morphemes, e.g. safety-pin, wedding-pie, class-consciousness, light-mindedness, pen-holder, etc.