This is the 10562nd most frequent French word.
malvenu
Unwelcome or inappropriate.
Here, 'malvenu' is used to describe an inappropriate or unsuitable action.
Il est malvenu d'interrompre quelqu'un en pleine conversation.
It is inappropriate to interrupt someone in the middle of a conversation.
In this sentence, 'malvenue' is used to express that the remark was untimely or better left unsaid given the circumstances.
Votre remarque était malvenue dans cette situation délicate.
Your comment was unwelcome in this delicate situation.
Here, 'malvenu' conveys the idea of an action being improper or undesirable socially.