Where does “underplot” come from?

underplot (English) comes from English under, from Middle English under, from Old English under, from Proto-Germanic under, from Proto-Indo-European h₁entér, from Proto-Indo-European h₁en — in; in, inside.

underplot (English): A subplot; a plot that is not the main plot of a...

Definitions

A subplot; a plot that is not the main plot of a...

Ancestry of “underplot”, step by step

underplot traces back through two separate lines of ancestry.

via English under

Step	Language	Word	Meaning
1	English	under	In or at a lower level than; As a subject of;...
2	Middle English	under	under
3	Old English	under	under, beneath
4	Proto-Germanic	under	among, between; under, beneath; under
5	Proto-Indo-European	h₁entér	between
6	Proto-Indo-European	h₁en	in; in, inside

via English plot

Step	Language	Word	Meaning
1	English	plot	The course of a story, comprising a series of...
2	Middle English	plot	plot of land
3	Old English	plot	a plot of ground
4	Proto-Germanic	plataz	slap, strike, blow
5	Proto-Indo-European	b(e)lad-	to strike, beat

Words derived from “underplot”

underplotted

Every word from Proto-Indo-European h₁en →Every word from Proto-Indo-European h₁entér →Every word from Proto-Germanic under →