Where does “thanksome” come from?

thanksome (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.

thanksome (English): Characterised by thankfulness or gratitude

Definitions

Characterised by thankfulness or gratitude

Ancestry of “thanksome”, step by step

thanksome 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 thank

Step	Language	Word	Meaning
1	English	thank	An expression of appreciation; a thought; To...
2	Middle English	thank	—
3	Old English	þanc	thanks; thought
4	Proto-Germanic	þankaz	thought; mind; consideration; remembrance;...
5	Proto-Indo-European	teng-	to think

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