This is the 3569th most frequent French word.
impossible
Not able to occur, exist, or be done.
The word 'impossible' is used as an adjective to describe the feasibility of completing the work within a certain timeframe.
Il est impossible de finir ce travail aujourd'hui.
It is impossible to finish this work today.
Here 'impossible' describes the student's perception of difficulty, serving as an adjective relating to understanding mathematics.
Cet élève trouve les mathématiques impossibles à comprendre.
This student finds mathematics impossible to understand.
In this context, 'impossible' characterizes the nature of the mission itself as highly challenging or unattainable.