镇守

镇守	zhèn shǒu	(of troops stationed in a strategic area) to defend / (fig.) to stand guard / to protect
镇	zhèn	to press down / to calm / to subdue / to suppress / to guard / garrison / small town / to cool or chill (food or drinks)
守	shǒu	to guard / to defend / to keep watch / to abide by the law / to observe (rules or ritual) / nearby / adjoining