In PEC the same root was also used in a contracted shape *-c̣ĕ- as part of names of tens, cf.:

    PL *-c̣V- > Tab. -c̣u-r (simi-c̣u-r 'thirty'), Rut. -c̣ɨ-r (xib-c̣ɨ-r id.), Tsakh. -c̣a-ĺ (xeb-c̣a-ĺ id.);

    PD *-c̣a-li > Ak. -c̣a-li (ħaIb-c̣a-li 'thirty'), Chir. ʕaIb-c̣a-le id.;

    Lak. -c̣a-l (muq̇-c̣a-l 'fourty' etc.);

    PA *-c̣o- > And. -c̣o-l- (ʎob-c̣o-l-gu 'thirty'), Cham. -c̣a- (ʎaʎa-c̣a-da id.), Tind. -c̣a- (ʎaba-c̣a-ja id.), Kar. -c̣a-da (ʎaba-c̣a-da id.), Botl. -c̣a-li- (habu-c̣a-li-da id.), Bagv. -c̣a (haba-c̣a id.), God. -c̣a-li (ʎabu-c̣a-li id.).

    Hurrian has replaced the numeral 'ten' by the word eman (of unknown origin), but has retained the root in ki-ži 'thirty' (ki- 'three'); names of other tens are unknown. See Diakonoff-Starostin 1986, 46.

    PL *u_ic̣ɨ- has lost the Inlaut resonant *-n-, possibly under the influence of *u_ilč̣ʷɨ- 'nine'. The original form *uinc̣ɨ-, however, is reflected in the Archi form moc̣o-r - a modification of the numeral 'ten' used in compounds (moc̣or s:ejṭu 'eleven', moc̣or q̇Iʷeṭu 'twelve' etc.).

    See Бокарев 1961, 70.

    A complicated case. PAK *ṗć̣ǝ can only go back to PWC *P-ć̣ʷǝ (a form which obviously corresponds to EC, see Trubetzkoy 1930, 82). The Ubykh form can go back to a voiced variant *źʷǝ; but the PAT form needs a more complicated explanation, if it belongs here at all: it may also reflect a secondarily voiced PWC variant *(b)-ʒ́ʷV > PAT *ža, with labialisation under the influence of PAT *zʷǝ 'nine' (*ža > *žʷa ).

    The hypothesis of uniting all three forms (PAT, PAK and Ub.) belongs to Abdokov (1973, 66). One can either accept it (with the complicated explanation presented above), or else separate the Ub. and Abkh. forms under a distinct protoform, PWC *ž́ʷV (since *ž́ʷ regularly gives PAT *žʷ and Ub. žʷ). However, Shagirov's attempt to unite Abkh. ž̌-ba 'nine' and ž̌a-ba 'ten' (Shagirov 1, 80-81) is certainly untenable: in the Bzyb. dialect they are opposed as ź̌-ba vs. ž̌-ba and go back to different PAT forms (*zʷǝ and *žʷa respectively).