This is the 9416th most frequent French word.
dissimulées
Hidden, concealed.
In this sentence, "dissimulées" is used as an adjective to describe the smiles, indicating that they are hidden or veiled.
Elle a caché ses émotions sous des sourires dissimulées.
She hid her emotions under concealed smiles.
Here, "dissimulées" characterizes the doors, suggesting they are hidden within the structure of the wall.
Les portes dissimulées dans le mur étaient presque invisibles.
The concealed doors in the wall were almost invisible.
In this case, "dissimulées" serves to specify the nature of the intentions, implying they are not openly expressed or exhibited.