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.