ツバメの巣す

noun

swallow's nest

Refers to the nest built by a swallow, typically made of mud and grass.

• 軒のき下したにツバメの巣すができた。

  A swallow's nest was built under the eaves.

noun

edible bird's nest; swiftlet nest

Specifically the nest of a swiftlet, used in Chinese cuisine to make bird's nest soup.

• ツバメの巣すは高こう級きゅう食しょく材ざいとして知しられている。

  Edible bird's nests are known as a luxury food ingredient.