Morphemes are the smallest units in the english language. In fact, words are made out of morphemes. The two kinds of morphemes are the phonemes, which are the syllabic properties of a word and can be determined by how they sound, and the graphemes, which are the smallest grammar units. To make things easy to understand, we can compare a morpheme to an atom. A bunch of atoms will make up a molecule in the same way that a bunch of morphemes can make up a word.