Where does “ساهم” come from?

ساهم (Arabic) comes from Arabic ه, from Arabic كَهْرَبَاء, from Persian کهربا, from Persian کاه, from Persian کاستن, from Proto-Iranian kas-, from Proto-Indo-European kʷeḱ- — to see; to look.

ساهم (Arabic): to join, to partake, to contribute to; to draw

Definitions

to join, to partake, to contribute to; to draw

Ancestry of “ساهم”, step by step

Step	Language	Word	Meaning
1	Arabic	ه	him, his, it, its; AH; Banū Ṭayyiʾ form of أَ
2	Arabic	كَهْرَبَاء	electricity
3	Persian	کهربا	amber
4	Persian	کاه	chaff; straw; hay
5	Persian	کاستن	to decrease
6	Proto-Iranian	kas-	to be small, diminish, lessen
7	Proto-Indo-European	kʷeḱ-	to see; to look

Every word from Proto-Indo-European kʷeḱ- →Every word from Proto-Iranian kas- →Every word from Persian کاستن →