巢立(すだ)ち

leaving the nest; becoming independent

巢作(すづく)り

nest building

巢箱(すばこ)

nest box; birdhouse

巢穴(すあな)

nest hole; animal den

巢窟(そうくつ)

den; lair; haunt

巢食(すく)う

to inhabit; to nest in

巢(す)ごもり

staying in one's nest; staying indoors

巢分(すわ)かれ

leaving the nest; swarming

庭(にわ)の木(き)に巢箱(すばこ)を取(と)り付(つ)けたところ、翌春(よくしゅん)には小鳥(ことり)が巢作(すづく)りを始(はじ)めた。

After I installed a nest box in the garden tree, small birds began building a nest the following spring.

連休(れんきゅう)は巢(す)ごもりして、読書(どくしょ)にふけった。

I stayed holed up during the long weekend and immersed myself in reading.