Proto-IE: *terg(')-
Meaning: to rub, to make holes
Tokharian: B tresk- ( < *treg-sk-) 'to chew' (Adams 319)
Latin: tergo, -ere; tergeo, -ēre, tersī, tersus (/ tertus) `abwischen, reinigen'
Other Italic: Umbr mantrahklu, mandraclo `mantēle'
Russ. meaning: тереть, дырявить
References: WP I 728 f