Where does “вписываться” come from?

вписываться (Russian) comes from Russian впи́сывать, from Russian вписа́ть, from Russian писа́ть, from German pissen, from Middle Low German pissen, from Dutch pissen, from Middle Dutch pissen, from Old French pissier — I piss.

вписываться (Russian): to blend (with), to fall in (with), to fit (into)

Definitions

to blend (with), to fall in (with), to fit (into)

Ancestry of “вписываться”, step by step

Step	Language	Word	Meaning
1	Russian	впи́сывать	to enter, to insert something to the text that is already written by writing
2	Russian	вписа́ть	to enter, to insert something to the text that is already written by writing
3	Russian	писа́ть	to write
4	German	pissen	to piss; to piss down
5	Middle Low German	pissen	—
6	Dutch	pissen	to piss
7	Middle Dutch	pissen	to piss
8	Old French	pissier	to piss; to excrete urine
9	Vulgar Latin	pissiare	present active infinitive of *pīssiō
10	Latin	pissio	I piss

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