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

§ 16. Distributional Meaning
Distributional meaning is the meaning of the order and arrangement of morphemes making up the word. It is found in all words containing more than one morpheme. The word singer, e.g., is composed of two morphemes sing- and -er both of which possess the denotational meaning and namely ‘to make musical sounds’ (sing-) and ‘the doer of the action’ (-er). There is one more element of meaning, however, that enables us to understand the word and that is the pattern of arrangement of the component morphemes. A different arrangement of the same morphemes, e.g. *ersing, would make the word meaningless. Compare also boyishness and *nessishboy in which a different pattern of arrangement of the three morphemes boy-ish-ness turns it into a meaningless string of sounds.¹

WORD-MEANING AND MOTIVATION

From what was said about the distributional meaning in morphemes it follows that there are cases when we can observe a direct connection between the structural pattern of the word and its meaning. This relationship between morphemic structure and meaning is termed morphological motivation.