三代同堂

three generations under one roof

three / 3

three generations of a family / the three earliest dynasties (Xia, Shang and Zhou)

to substitute / to act on behalf of others / to replace / generation / dynasty / age / period / (historical) era / (geological) eon

like / same / similar / together / alike / with

see 衚衕|胡同[hu2 tong4]

to live under the same roof (of different generations)

(main) hall / large room for a specific purpose / CL:間|间[jian1] / relationship between cousins etc on the paternal side of a family / of the same clan / classifier for classes, lectures etc / classifier for sets of furniture