arrière-pensée

ar·ri·ère-pen·sée

 (ăr′ē-âr′päN-sā′)
n.
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).]

arrière-pensée

(arjɛrpɑ̃se)
n
an unrevealed thought or intention
[C19: literally: behind thought]

ar•rière-pen•sée

(a ryɛr pɑ̃ˈseɪ)

n., pl. -pen•sées (-pɑ̃ˈseɪ)
French.
a mental reservation; hidden motive.

arrière-pensée

A French word meaning an unspoken thought or mental reservation.