This is the 7035th most frequent French word.
massé
"Massé" means "massaged" or "gathered" in English, depending on context.
In this sentence, 'massé' is used as a verb in the past tense, indicating the action of massaging.
Il a massé ses épaules après une longue journée.
He massaged his shoulders after a long day.
Here, 'massés' is used as a reflexive verb in the past tense, meaning 'assembled' or 'gathered'.
Les manifestants se sont massés devant l'hôtel de ville.
The protestors gathered in front of the town hall.
In this context, 'massé' implies the act of manipulating or applying substance (colors) in a manner similar to massaging.