Sensible, adj : sensitive, delicate, complicated, noticeable, perceptible.

The French word « sensible » looks exactly like the English word “sensible.” The problem is that the word “sensible” has a different meaning in English than it does in French.

In English, “sensible” can mean “reasonable” or “rational” and can refer to someone as having common sense.

In French, « sensible » generally means to be “sensitive,” or that something is delicate, or noticeable.

Elle est très sensible à la pollution. Sois raisonnable, arrête de fumer.
She is very sensitive to pollution. Be sensible, stop smoking.

Je ne sais pas si je peux lui parle de la situation. Le sujet est très sensible.
I don’t know if I can talk to her about the situation. The subject is very delicate / complicated.

Il y a une différence sensible de confort entre ces deux chambres d’hôtel.
There is a noticeable difference in comfort between these two hotel rooms.