אֲרֻבָּה ʼărubbâh (H699)

a lattice; (by implication) a window, dovecot (because of the pigeon-holes), chimney (with its apertures for smoke), sluice (with openings for water)

1) lattice, window, sluice 2) (CLBL) chimney (lattice opening where smoke escapes)

feminine participle passive of אָרַב (H693) (as if for lurking);