5 words in this vocabulary list
noun a line separating two countries, administrative divisions, or other areas
verb to form an edge along or beside (something)
noun a professional administrator who is responsible for overseeing the day-to-day operations of a city government
noun a system of pipes or channels that carry away excess water or liquid waste
adjective related to the process of draining or removal of liquid
adjective An adjective is a word that describes or modifies a noun or pronoun. In this case, 'unsustainable' describes something that cannot be maintained or continued at its current rate or level.
adjective not cared for or looked after; neglected