The Tocharian B word śa(k)-ṣkäs
Word śa(k)-ṣkäs
IPA ɕɐ(k)ʂkəs
Meaning sixteen

Comments
Douglas Q. Adams, “Etymological Dictionary of Tocharian B”, 1999, Brill

Other words that might be of interest
ṣe ‘one’, wi ‘two’, trey ‘three’, śtwer ‘four’, piś ‘five’, okt ‘eight’, okt-yaltse ‘eight thousand’, oktante ‘eighth’, oktamka ‘eighty’, piṅkte ‘fifth’, śtarte ‘fourth’, ñu ‘nine’, ñultse ‘nine thousand’, ñumka ‘ninety’, ñunte ‘ninth’, ṣukt ‘seven’, śak-ṣukt ‘seventeen’, ṣuktante ‘seventh’, ṣuktaṅka ‘seventy’, ṣkas ‘six’, ṣkaste ‘sixth’, ṣkaska ‘sixty’, trite ‘third’, täryāka ‘thirty’, trai ‘three’