A mental reservation, as about the validity of something.
[French : arrière, in back (from Old French arere; see arrears) + pensée, thought (from penser, to think; see pensive).]
an unrevealed thought or intention
[C19: literally: behind thought]
ar•rière-pen•sée(a ryɛr pɑ̃ˈseɪ)
n., pl. -pen•sées (-pɑ̃ˈseɪ)
a mental reservation; hidden motive.
A French word meaning an unspoken thought or mental reservation.