- Agglutination

In linguistics, agglutination is the morphological process of adding affixes to the base of a word. Languages that use agglutination widely are called agglutinative languages. These languages are often contrasted with fusional languages and isolating languages. However, both fusional and isolating languages may use agglutination in the most-often-used constructs, and use agglutination heavily in certain contexts, such as word derivation. This is the case in English, which is an isolating language, but has an agglutinated plural marker -(e)s and derived words such as shame·less·ness.

Agglutinative suffixes are often inserted irrespective of syllabic boundaries, for example, by adding a consonant to the syllable coda as in English tie — ties. Native speakers of strongly agglutinating languages untrained in linguistics cannot usually break down an agglutinated word into its components. Agglutinative languages also have large inventories of enclitics, too, which can be and are separated from the word root by native speakers in daily usage.

Source: Wikipedia