Introduction to probability theory: word expression for A - BC

Question

A simple question: if $A$ is the event of a man who is older than 40, $B$ is the event where he is older than his wife, and $C$ is the event where his wife is older than 40. How can the event $A - BC$ be described in word? My attempt was: the husband is older than 40 but either his wife maximum age is 40 or she is older than him. Was it correct? The reason I ask this question is I want to be able to translate a probability question back to a mathematical expression. Thanks.

EDIT

Visually, $A$ is the area on the right side of the red broken line, $BC$ is the triangular area formed by black and blue broken line. Thus, $A - BC$ would include any O points but not X point. As the result, I described $A - BC$ as "the husband was older than 40, whilst either his wife maximum age was 40 or she was older than him."

Answer 1

Very sorry for the confusion, I had a mistake in my former version of this. Here is my revision.

Event $BC$ contradicts $A,$ because $BC$ implies that the man is over 40. Thus $A - BC$ is null. More formally:

$$D = BC = \{M>W, W>40\} \subset \{M > 40\} = A$$

because the former condition implies the latter. Then $A - BC = A - D = AD^c = \emptyset.$