Where does “bipolar” come from?

Bipolar comes from English bi- plus polar, which derives from Latin polāris, formed from Latin pōlus meaning "pole" and the Latin suffix -ālis.

bipolar (English): Involving or having both extremes or poles at the...

Definitions

Step	Language	Word	Meaning
1	English	bi-	API; two, paired, both; half
2	Ancient Greek	βίος	life
3	Ancient Greek	Γένεσις	Genesis. The title of the first book of the Bible and Pentateuch as in the Septuagint translation in Greek
4	Proto-Hellenic	génetis	origin, source
5	Proto-Indo-European	ǵénh₁tis	birth, production
6	Proto-Indo-European	ǵenh₁-	to produce, to beget, to give birth