This article examines the processes of word formation in Turkic languages, with particular focus on Turkish and English, highlighting the similarities and differences between agglutinative and fusional language types. Agglutinative languages are characterized by the linear addition of affixes to a root word, where each affix typically expresses a single grammatical feature. In contrast, English, as a fusional language, often combines multiple grammatical meanings within a single affix. The study investigates the morphological structures, affixation patterns, syntactic influences, and semantic changes in these language families. Findings indicate that although both language types use affixes in word formation, the ways grammatical words and phrases function and are used in a foreign language differ significantly due to variations in syntactic structure, inflection, and derivation.

agglutinative, fusional, word formation, Turkic languages, English, morphology, affixation, inflection, root.

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