Monosyllabic roots of the form CVS (C – stop, V – vowel, S – sonorant), so-called ”monoplosive roots”, were often reduplicated in Kymna. This served both the purpose of intensification and avoidance of too short words. They all developed after the manner CVSCVS > (C)SVCVS (cf. Old Church Slavonic глаголъ < *galgal) and thus often led to palindromes. If the second stop was voiceless unaspirated, it became aspirated very early on and thus developed like an original aspirated stop.
√phos: K. sofos ’wind’ < *phosphos (T. ϕos)
√kas: K. sachas ’fire’ < *kaskhas (T. kas); from *saças by dissimilation for expected *sasas
√ban: K. navan ’sun’ < *banban (T. bánat, bármen)
√per: K. recher ’chief, leader’ < *perpher (T. per- ’ἀρχι-’)
√thar: K. þraþar, fraþar ’powder’ < *tharthar (T. θármi)
√tal: K. laþal ’speech’, M. lafal < *talthal (T. tálmit ’all the words, language’)
√kar: K. akrasar ’good luck’ < *a-karkhar (T. kára ’state of good luck’); note no change kr > chr, as metathesis postdated this spirantization
√kal: K. klasal ’dirt’ < *kalkhal (T. kal ’mud, clay’)