Savoir
Je ne sais comment cela est arrivé = I am at a loss to explain how it happened.
Pas que je sache = Not to my knowledge.
Je suis tout je ne sais comment = I am out of sorts.
C’est à savoir = That remains to be seen.
Il en sait plus d’une (fam.) = He knows more than one trick; He knows a trick or two.
Il a beaucoup de savoir faire = He has his wits about him; He knows how to manage people.
Il a du savoir vivre = He knows how to behave; He is well bred.
Un je ne sais quoi = A “something” (I know not what).
*De savoir vient avoir = Knowledge is power.