The Proto-Indo-European word *kelh₁-
Word *kelh₁-
Meaning to strike
See also Proto-Indo-European: *kel- ‘hew, strike’
Synonyms *bʰlaĝ-, *bʰlihₓĝ-, *gʷel-, *gʷhen-, *wel(h₂)-, *plehₐk/g-

Comments
Mallory J.P. and Adams D. (2006)

Other words that might be of interest
*pleh₂k- ‘to hit’