Proto-IE: *k'ol-
Meaning: thorn, awn, a k. of thorny plant
Old Indian: śila- m. 'gleaning, gathering stalks or ears of corn'
Celtic: *kolino- > Ir cuilenn; Cymr celyn, Corn kelin, Bret quelenn `Stechpalme, Mäusedorn, Walddistel'
Russ. meaning: колючка, ость колоса, вид колючего растения
References: WP I 431f, 435 f