This is the 7053rd most frequent French word.
mauvaise
"Bad" or "wrong."
The word 'mauvaise' (bad) is used as an adjective to modify 'idée' (idea), describing the nature of the idea as being unfavorable or not good.
C'est une mauvaise idée de sortir sous la pluie.
It's a bad idea to go outside in the rain.
Here, 'mauvaise' serves as an adjective describing 'note' (grade), indicating that the grade obtained was unsatisfactory or below expectation.
Elle a eu une mauvaise note à l'examen.
She got a bad grade in the exam.
In this example, 'mauvaise' is an adjective qualifying 'action' (deed), implying that the deed performed is considered morally or ethically incorrect.