sinon

except, apart from; if not; otherwise, or else

“Je ne sais pas grand-chose, sinon que je t'aime.” — I don't know much, except that I love you.

Contraction of Middle French si non. Compare Catalan sinó, Portuguese senão, and Romanesco "sinnò".

also; additionally; furthermore; anyway

“On ne dira donc pas, ce que l’on entend hélas trop souvent, il a un bel appartement à Paris, sinon il a aussi une maison en Vendée ; toute sa famille va bien, et, sinon, sa sœur vient de se marier.” — We will not say then, what we, alas, hear too often: he has a beautiful apartment in Paris, he also has a house in the Vendée too; his whole family is well, and, what's more, his sister just got married.

Contraction of Middle French si non. Compare Catalan sinó, Portuguese senão, and Romanesco "sinnò".