summerhouse
noun [ C ] uk/ˈsʌm.ə.haʊs/ us/ˈsʌm.ɚ.haʊs/
（花园中的）凉亭，凉棚
a small building in a garden used for sitting in during the summer
US（海滨或山中的）避暑别墅
a house at the beach or in the mountains that you live in for part or all of the summer