ark. Hebrew. tebah = a floating [building] (not 'aron, a chest). So in Exo_2:2, Exo_2:3.
of. Genitive of material. App-17.
rooms = nests.
pitch it = coat it. Hebrew. kaphar, to cover: the only word for "atonement" in O.T. So that it is only atonement that can keep the waters of judgment from us.
with pitch = Hebrew. kopher = resin (not "pitch" or bitumen, which is zepheth,Exo_2:3Isa_34:9, Isa_34:9).