An affix is a morpheme that is attached to a stem to form a word. Affixes may be derivational, like English -ness and pre-, or inflectional, like English plural -s and past tense -ed. They are bound morphemes by definition; prefixes and suffixes may be separable affixes.
Affixes are divided into several categories, depending on their position with reference to the stem. Prefix and suffix are extremely common terms. Prefix and suffix may be combined as adfix, a term that is rarely used except in contrast with infix. Infix and circumfix are less so, as they are not important in European languages. The other terms are uncommon.
Affixes are divided into several categories, depending on their position with reference to the stem. Prefix and suffix are extremely common terms. Prefix and suffix may be combined as adfix, a term that is rarely used except in contrast with infix. Infix and circumfix are less so, as they are not important in European languages. The other terms are uncommon.
