This is the 11032nd most frequent French word.
plaisante
Pleasant; amusing.
Here, 'plaisante' is used as a verb meaning 'to joke'.
Elle plaisante toujours pour alléger l'atmosphère.
She always jokes to lighten the mood.
In this context, 'plaisante' is used as an adjective meaning 'pleasant'.
Une fille plaisante et intelligente est souvent appréciée.
A pleasant and intelligent girl is often appreciated.
Again, 'plaisante' functions as a verb, indicating an action of joking.