[Grammar] Is the word "upon" a free morpheme?

[alkata]

Hi,

I would like to know if the word upon is a word by itself (a free morpheme) or is it a made up of "up" (derivational prefix) + on (free morpheme).
Hope someone can enlighten me on this. Thanks!

 

[bhaisahab]

Hi,

I would like to know if the word upon is a word by itself (a free morpheme) or is it a made up of "up" (derivational prefix) + on (free morpheme).
Hope someone can enlighten me on this. Thanks!

See if this helps: Online Etymology Dictionary

 

[Tdol]

Oxford dictionary give it as formed from up + on: upon: definition of upon in Oxford dictionary (American English) (US)