-in

-in is a German ending with different meanings and usage forms.

In place names

The place names ending in -in with final syllables are derived from different Slavic place name types.

Place names formed from personal names ending in -in or -yn
- Boitin (in Mecklenburg), originated from * Bytyn , where the asterisk (*) means that this form has not been handed down, but was reconstructed by comparison.
- Növenthin (in Wendland) < * Novętin
- Eutin < Utin
appellative place names
- Gollin (in the Templin district) < * Goldin
- Schwerin (in Mecklenburg, Pomerania and the Grenzmark) < * Zvěrin
Natural names on -ina
- Klötzin (in the districts of Oldenburg and Belgard) < * Kľučina
Neuter forms to -ino and -yno
- Gnewin (in the Lauenburg district, Pomerania) < * Gněvino
appellative place names on -en or originally -eń
- Kammin (in the Wismar district) and Camin (in the Hagenow district) < * Kameń

Unstressed "-in" often denotes a feminine form of a word; see: gender , movement , suffix .
In chemical nomenclature (stressed) -in stands for alkynes and outside the nomenclature as a suffix for alkaloids , amines , amino acids and other chemical compounds .

Wiktionary: -in - explanations of meanings, word origins, synonyms, translations

↑ ^a ^b Walter Kaestner, Low German-Slavic Interferences ; in: Handbook for Low German Linguistics and Literature Studies , ed. by Gerhard Cordes and Dieter Möhn , Berlin 1983, ISBN 3-503-01645-7 , pp. 678-729; P. 707-708 = Section 3.1.2.2
↑ -a ⁴ . In: Lexico. Retrieved November 24, 2019 .