Latin / Romance -mus verb ending

[tvdxer]

In Spanish or Portuguese it's -mos, Italian -mo, etc. All these, apparently, derive from the Latin -mus. But where does that derive from? I've never been able to find a good answer on my own.

[treskro]

The predecessor of Latin.

[Soap]

http://enwp.org/PIE_verb shows several different possibilities for the PIE version of it, but they all seem to be unanalyzable single morphemes, which suggests that no one really knows "why" it came from -mes or -mos or whatever it is.

[Ulrike Meinhof]

http://enwp.org/PIE_verb shows several different possibilities for the PIE version of it, but they all seem to be unanalyzable single morphemes, which suggests that no one really knows "why" it came from -mes or -mos or whatever it is.

1sg -mi + plural? </never studied IE linguistics>

[TaylorS]

IIRC the the most archaic PIE form of the 1PL morpheme is *-mes, which likely goes back to older Pre-PIE *-mə and a plural *-t

[Vuvuzela]

IIRC the the most archaic PIE form of the 1PL morpheme is *-mes, which likely goes back to older Pre-PIE *-mə and a plural *-t

Is that just based on internal reconstruction, or is it based on an attempt to like IE with Uralic?

[WeepingElf]

IIRC the the most archaic PIE form of the 1PL morpheme is *-mes, which likely goes back to older Pre-PIE *-mə and a plural *-t

Is that just based on internal reconstruction, or is it based on an attempt to like IE with Uralic?

I think TaylorS slipped into Indo-Uralic here with the "plural *-t". While it makes sense to analyse PIE 1pl. *-mes as a complex of a first singular ending and a plural marker, the internally reconstructible morphemes are *-m and *-es, respectively.