/o.si/
too, also, as well; as (used for equal comparisons)
“Moi aussi” — Me too.
Inherited from Middle French aussi, from Old French ossi, ausi, alsi (“as, in the same way as”), from Vulgar Latin *ale si (“other so, else so”), from Latin alid, aliud (“other, another, any other, else”) + sīc (“so, thus”); probably a calque of Frankish *allswā (“as, likewise, in the same way”). Compare also similarly formed Old French altresi (“as, in the same way as, also, as well”) and Italian altresì.
therefore
“Le général était podagre depuis longtemps et ne pouvait se déplacer qu'avec d'extrêmes difficultés ; aussi se faisait-il porter par ses soldats.” — The general had been gouty for some time and could only move around with extreme difficulty; thus he had his soldiers carry him.
Inherited from Middle French aussi, from Old French ossi, ausi, alsi (“as, in the same way as”), from Vulgar Latin *ale si (“other so, else so”), from Latin alid, aliud (“other, another, any other, else”) + sīc (“so, thus”); probably a calque of Frankish *allswā (“as, likewise, in the same way”). Compare also similarly formed Old French altresi (“as, in the same way as, also, as well”) and Italian altresì.