Where does “писало” come from?

писало (Russian) comes from Russian писа́ть, from German pissen, from Middle Low German pissen, from Dutch pissen, from Middle Dutch pissen, from Old French pissier, from Vulgar Latin pissiare, from Latin pissio — I piss.

писало (Russian): pointed writing implement used for carving letters in birchbark, stylus

Definitions

pointed writing implement used for carving letters in birchbark, stylus

Ancestry of “писало”, step by step

Step	Language	Word	Meaning
1	Russian	писа́ть	to write
2	German	pissen	to piss; to piss down
3	Middle Low German	pissen	—
4	Dutch	pissen	to piss
5	Middle Dutch	pissen	to piss
6	Old French	pissier	to piss; to excrete urine
7	Vulgar Latin	pissiare	present active infinitive of *pīssiō
8	Latin	pissio	I piss

Every word from Latin pissio →Every word from Vulgar Latin pissiare →Every word from Old French pissier →