Comparative evidence

2.ker, 2.sker

• Hitt. iskār- /iskar- 'pierce', 'sting', 'stab', 'stick' (to) (EDHIL: 400f.)

• Hitt. kartae- 'cut off' (EDHIL: 455f.) According to Oettinger (1979: 375f.) kartae- goes back to a denominal stem*kr-to-ie-. Kloekhorst (EDHIL: 455f.) connects kartae- to *kert- 'cut'.

References

EDHIL = Kloekhorst, A. 2008. Etymological Dictionary of the Hittite Inherited Lexicon. Brill.
Oettinger 1979 = Oettinger, N. 1979. Die Stammbildung des hethitischen Verbums. Hans Carl.