adaptation, the quality of being suited to some condition or requirement / (biology, evolutionary theory) an adaptation; a trait that makes an organism better suited to an environment

adapt, adjust, fit in, conform

important, significant

importance, consequence, significance

change in society, climate, or condition, transformation, variety / variation / declension / (sumo) a step to one side during the tachiai, the initial charge at the start of a sumo match; a sidestep

to change, to vary

goblin, ghost; an apparition

society (group of people sharing culture) / a class, a world of a certain group

importance

social science