mindmap root((保护)) shelter implies temporary protection of a screen or roof from something that would harm or annoy: seek ~ from the storm in a cave. cover stresses concealment and often applies to a natural shelter or something similarly protective: advanced under ~ of darkness. retreat stresses usually voluntary retirement from danger or annoyance and escape to a safe, secure, or peaceful place: built themselves a country ~. refuge implies an attempt to flee from whatever threatens or harasses: sought ~ in the deserted house. asylum adds to refuge the implication of the finding of safety and of exemption from seizure: asked for and was granted political ~. sanctuary stresses the claim of a refuge to reverence or inviolability: established a wildlife ~.