Formed by partial reduplication of the stem. The exact realization varies considerably, and is dependent on the specific form of the root:

IMPERFECT - PERFECT (3.SG)

Consonant-final stems reduplicate the last vowel and the consonant:

būg - būgūg, gik - gigik

Vowel-final stems reduplicate only the consonant:

pou - poup, yaki - yakik

Cluster-final stems reduplicate only the initial consonant of the cluster:

romb - rombom, ṭarp - ṭarpar

Stems ending in ŕ, y, or w gain a final sh or s (in South Frinthan they subsequently become ə, ĭ and ŭ respectively, and eventually disappear entirely:

ōūŕo - ōūŕoŕsh/ōūŕoŕs, m̃ofyō - m̃ofyōys

ōūŕo - ōūŕoŕsh/ōūŕo(ə)s, m̃ofyō - m̃ofyō(ĭ)s

Reduplicated x becomes s:

xī - xīs

Reduplicated h becomes n:

teh - tehen