Where does “nagsome” come from?

nagsome (English) comes from English some, from Middle English som, from Old English sum, from Proto-West Germanic *sum, from Proto-Germanic sumaz, from Proto-Indo-European sem- — together, one.

nagsome (English): Characterised or marked by nagging

Definitions

Characterised or marked by nagging

Ancestry of “nagsome”, step by step

nagsome traces back through two separate lines of ancestry.

via English some

Step	Language	Word	Meaning
1	English	some	A certain number, at least two; An indefinite...
2	Middle English	som	some
3	Old English	sum	some
4	Proto-West Germanic	*sum	some
5	Proto-Germanic	sumaz	some (one), a certain (one)
6	Proto-Indo-European	sem-	together, one

via English nag

Step	Language	Word	Meaning
1	English	nag	A small horse; a pony; An old useless horse; A...
2	Middle English	nagge	A nag, pony, a small horse

Every word from Proto-Indo-European sem- →Every word from Proto-Germanic sumaz →Every word from Proto-West Germanic *sum →