Re: How to do "But/However"

I couldn't discover who wrote this:

>1. How do your conlangs handle but/however?
In Senjecas "but" is derived from the verb "anta," to oppose, to
face.

ântis = opposite, facing.
ántëvi = opposite, facing (adv.)
ánti = but
ântos = front, façade, face [of a coin].
ântus = opponent, adversary.

"However" is derived from the verb "licüa," to leave (behind, over).

lîcüis = left (over), remaining.
licüô = by the way (interjection). Interjections are accented on the
last syllable.
lîcüos = remainder, rest.
lícyvi = after all, however, yet.  <y> = /U/

While we're on the subject of "buts," what is the history of, the
reason for, the etymology of two contrasting "buts" in a language.
I am thinking of the German aber/sondern and the Spanish pero/sino.
I would imagine that "sino" < Latin sine.

Charlie