From an unused root meaning to dissever, i.e. Crush -- deceitful.

ū·ṯə·yā·šîm — 2 Occ.
mit·tō·wḵ — 1 Occ.
tōḵ — 1 Occ.
wā·ṯōḵ — 1 Occ.
tuk·kū — 1 Occ.
lat·tə·ḵū·nāh — 1 Occ.
ū·ṯə·ḵū·nā·ṯōw — 1 Occ.
tə·ḵū·nā·ṯōw — 1 Occ.
wə·ṯū·kî·yîm — 1 Occ.
wə·ṯuk·kî·yîm — 1 Occ.
tiḵ·lāh — 1 Occ.
taḵ·lîṯ — 5 Occ.
bat·tə·ḵê·leṯ — 3 Occ.
hat·tə·ḵê·leṯ — 4 Occ.
tə·ḵê·leṯ — 35 Occ.
ū·ṯə·ḵê·leṯ — 7 Occ.
ham·ṯuk·kān — 1 Occ.
niṯ·kə·nū — 1 Occ.
ṯik·kan·tî — 1 Occ.
tik·kên — 3 Occ.