Ultimately from Proto-Indo-European *ḱm̥tóm. The vocalism is highly aberrant; the expected *ę from Proto-Balto-Slavic *im < IE *m̥ is found in *tysęti. The back vowel is sometimes connected with dialectal Lithuanian šum̃tas of dubious antiquity, leaving the lack of nasal unexplained still. Owing to these difficulties, an external source has been looked for, perhaps Iranian; higher numerals like ‘hundred’ are frequently borrowed.
Accent paradigm c.
- South Slavic: