Where does “пиличка” come from?

пиличка (Bulgarian) comes from Bulgarian пила, from Proto-Slavic pila, from Old High German fil — file.

Ancestry of “пиличка”, step by step

StepLanguageWordMeaning
1Bulgarianпилаindefinite feminine singular past active aorist...
2Proto-Slavicpilasaw, file
3Old High Germanfilfile
Every word from Old High German fil →Every word from Proto-Slavic pila →Every word from Bulgarian пила →