Godan verb with 'ru' ending, Intransitive verb
to rise gradually; to rise slowly
歯を食い縛る、喉元までせりあがった感情を強引に飲み込む。He grits his teeth and forces back his growing fear. to come up from below the stage (by being lifted up on the stage elevator)
Also written 迫り上がる【せりあがる】