From Japanese-German FreeDict Dictionary ver. 0.2.0:
[ichi1] [news1] [nf07] 巣 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, 栖 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, [ichi1] [news1] [nf07] す /sˈɯᵝ/
(noun (common) (futsuumeishi))
(1) (n) Nest, (m) Bienenkorb, (n) Wespennest, (m) Horst, (m) Bau, (f) Höhle, (m) Schlupfwinkel, (2) (n) Räubernest, (f) Räuberhöhle