This is the 10233rd most frequent French word.
incompréhensibles
Impossible or difficult to understand.
The word 'incompréhensibles' is used as an adjective describing the noun 'instructions,' implying that they are not understandable.
Les instructions pour assembler ce meuble sont incompréhensibles.
The instructions to assemble this piece of furniture are incomprehensible.
Here, 'incompréhensibles' modifies the noun 'explications,' indicating their inability to be understood due to lack of clarity or complexity.
Ses explications sur le problème étaient complètement incompréhensibles.
His explanations about the issue were completely incomprehensible.
In this case, 'incompréhensibles' applies to 'motivations,' expressing the speaker's difficulty in understanding or rationalizing them.