Englishfor English speakers
derivational
—
adjective
characterized by inflections indicating a semantic relation between a word and its base
the morphological relation between 'sing' and 'singer' and 'song' is derivational
morpheme
Noun
—
Part of a word. A morpheme is the smallest unit of meaning in a language. Basic words (word roots) and word endings like "-ed," "-s," and "-ing" are examples of morphemes.