fusional language

A fusional language is a type of synthetic language, distinguished from agglutinative languages by their tendency to overlay many morphemes to denote grammatical, syntactic, or semantic change. For example, the Spanish language verb comer ("to eat") can be expressed in first-person past preterite tense as comí, a word formed removing the "-er" suffix of the verb and replacing it by "-í", that indicate such specific meaning.