This is the 13349th most frequent Russian word.
мятежной
"Мятежной" means "rebellious" in English.
The word 'мятежной' describes the soul as rebellious or defiant.
Она обладала мятежной душой, стремящейся к свободе.
She had a rebellious soul longing for freedom.
The word 'мятежной' characterizes the manner of the mass as carried by defiance or unrest.
Мятежной массой устремились люди на площадь.
The crowd surged onto the square in a rebellious manner.
Here, 'мятежные' reflects the defiant or revolutionary mood prevalent during the described times.