The Tocharian A word pänt
Word pänt
Meaning fifth
See also Tocharian B: piṅkte ‘fifth’
Proto-Indo-European: *pn̥kʷtós ‘fifth’

Other words that might be of interest
okät ‘eight’, oktuk ‘eighty’, taryāk ‘thirty’, trit ‘third’, tre ‘three’, päñ ‘five’