Where does “insubstantive” come from?

insubstantive (English) comes from English in-, from Middle English in-, from Old English in-, from Old English in, from Proto-West Germanic *in, from Proto-Germanic in, from Proto-Indo-European én — in.

insubstantive (English): Not substantive; Unable to be substantiated;...

Definitions

Not substantive; Unable to be substantiated;...

Ancestry of “insubstantive”, step by step

Step	Language	Word	Meaning
1	English	in-	in, into, towards, within; in, into; Used with...
2	Middle English	in-	—
3	Old English	in-	in, into; on, upon; internal, positioned on the...
4	Old English	in	in; Alternative form of inn
5	Proto-West Germanic	*in	—
6	Proto-Germanic	in	in; into
7	Proto-Indo-European	én	in

Every word from Proto-Indo-European én →Every word from Proto-Germanic in →Every word from Proto-West Germanic *in →