tardunud
Tardunud is a term primarily used in Estonian linguistics. It refers to a phenomenon where a short vowel in a closed syllable is lengthened. This lengthening is not the same as a long vowel that existed historically. Instead, it's a result of the syllable structure changing over time, typically through the loss of a final consonant or the shortening of a following vowel. This process is a distinctive feature of the Estonian language, contributing to its unique phonetic landscape.
The concept of tardunud is closely related to Estonian vowel gradation, a system of alternations in vowels