Where does “Kürbisgewächs” come from?

Kürbisgewächs (German) comes from German Gewächs, from German wachsen, from Middle High German wahsen, from Old High German wahsan, from Proto-West Germanic wahsan, from Proto-Germanic wahsijaną, from Indo-European *h₂weks-.

Kürbisgewächs (German): any plant of the cucurbits or the gourd family (Cucurbitaceae)

Definitions

any plant of the cucurbits or the gourd family (Cucurbitaceae)

Ancestry of “Kürbisgewächs”, step by step

Kürbisgewächs traces back through two separate lines of ancestry.

via German Gewächs

Step	Language	Word	Meaning
1	German	Gewächs	plant
2	German	wachsen	to grow; to grow, to increase; to wax
3	Middle High German	wahsen	to grow
4	Old High German	wahsan	to grow
5	Proto-West Germanic	wahsan	to grow
6	Proto-Germanic	wahsijaną	to grow
7	Indo-European	*h₂weks-	—

via German Kürbis

Step	Language	Word	Meaning
1	German	Kürbis	pumpkin, gourd, squash
2	Middle High German	kürbiz	—
3	Old High German	kurbiȥ	—
4	Proto-West Germanic	kurbit	gourd, cucurbit
5	Latin	cucurbita	gourd, cucurbit, including watermelon; dolt

Every word from Indo-European *h₂weks- →