*Qui plus sait plus se tait = A still tongue shows a wise head.

*Qui rien ne sait, de rien ne doute = Who knows nothing, doubts nothing; Ignorance is bliss.

Savon

Je lui donnerai un savon (fam.) = I will blow him up.

[German: Ich werde ihm den Kopf waschen.]

Scène

Je lui ai fait une scène = 1. I had a row with him. 2. I reproached (or, abused) him violently.

Scie

Quelle scie! (fam.) = What a bother!

Séance