|Died||20 September 1916 (aged 76)|
|Indo-European studies, Baltic and Slavic languages|
Leskien was born in Kiel. He studied philology at the universities of Kiel and Leipzig, receiving his doctorate from the latter in 1864. He taught Latin and Ancient Greek at the Thomasschule zu Leipzig from 1864 to 1866. In 1866, he began studying comparative linguistics under August Schleicher at the University of Jena. He completed his habilitation in 1867 and went on to lecture at the University of Göttingen.
He was appointed as the extraordinary professor (außerordentlicher Professor) of comparative linguistics and Sanskrit at Jena in 1868. Two years later, he was named as the extraordinary professor of Slavic philology at the University of Leipzig, where he delivered the first course there in Slavic languages. He was promoted to full professorship (ordentlicher Professor) in 1876 and remained in the position until 1915.
In 1884 he became an editor of Ersch and Gruber's Realencyklopädie. Leskien was a founding member of the journal Archiv für slavische Philologie. He died in Leipzig.
Leskien was a central figure in the group of linguists at Leipzig who later became known as the Neogrammarians. The group strove to approach linguistics in a scientific manner; Leskien formulated their main doctrine, namely that phonetic laws have no exceptions (Ausnahmslosigkeit der Lautgesetze). Leskien's hypothesis was that phonetic shifts do not occur randomly or haphazardly, but instead are the product of directly observable conditions. Among the students that Leskien taught are: Jan Niecis?aw Baudouin de Courtenay, Ferdinand de Saussure, Leonard Bloomfield, Nikolai Trubetzkoy, Karl Verner and Adolf Noreen. Thus Leskien can be seen as a key founder of modern comparative linguistics, particularly in the fields of Baltic and Slavic languages.
In his 1881 essay 'Die Quantitätsverhältnisse im Auslaut des Litauischen', Leskien formulated Leskien's Law, a sound law devised to describe a particular aspect of sound change in Lithuanian. According to this law long vowels, along with the diphthongs ie and uo, with an acute intonation are shortened in the final syllable of a word. Leskien is also the author of Handbuch der altbulgarischen Sprache, a guide to Old Church Slavonic (3rd ed. 1898; 8th, revised and enlarged edition 1962). Although superseded in places by more recent studies, the book is still in print and remains in use by scholars to the present day. With Karl Brugmann, he edited Litauische Volkslieder und Märchen ("Lithuanian Folk Songs and Tales"; 1882).
Other works include:
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