on ones initiative (adverb) voluntarily: of one's own free will
Sinonime: dead*, deadpan, dull, empty, fish-eyed, impassive, inexpressive, inscrutable,
lackluster, lusterless, nobody home, poker-faced,
stolid, straight-faced, stupid, unexpressive, vacant, vacuous, wooden
Antonime: animated, demonstrative,
expressive