Where does “opine” come from?

Opine comes from Latin opinor, meaning to think or suppose, combined with the Latin suffix -inus, ultimately deriving from Proto-Indo-European -iHnos and -no-.

opine (English): To have or express an opinion; to state as an...

Definitions

To have or express an opinion; to state as an...

Ancestry of “opine”, step by step

opine traces back through two separate lines of ancestry.

via Ancient Greek ὀπός

Step	Language	Word	Meaning
1	Ancient Greek	ὀπός	juice, vegetable/plant juice; fig-juice
2	Proto-Indo-European	sokʷós	juice of plants
3	Proto-Indo-European	sekʷ-	to follow; to see; to say

via Middle French opiner

Step	Language	Word	Meaning
1	Middle French	opiner	—
2	Latin	opīnor	to suppose, imagine, deem, think, judge, opine
3	Latin	opīnus	—

Words derived from “opine”

opiner
opineth
opination
opinability

Every word from Proto-Indo-European sekʷ- →Every word from Proto-Indo-European sokʷós →Every word from Ancient Greek ὀπός →