unruly; rebellious; rebelling against authority
As their fear of dropping off the edge of the world increased, Columbus' crew became mutinous.
movere (to move) (Latin)
try to extract mute + tiny from this word. so someone who is neither mute nor tiny. (in thoughts) can be rebellious. mutiny means open rebellion against constituted authority (especially by soldiers against their officers) We all remember "Sepoy Mutiny" of 1857.