N3 - 区別くべつ
distinction, differentiation, classification
N3 - 地区ちく
district, section, sector
N2 - 区域くいき
limits, boundary, domain, zone, sphere, territory
N2 - 区切るくぎる
to punctuate, to cut off, to mark off, to stop, to put an end to
N2 - 区分くぶん
division, section, classification
N1 - 区く
ward, district, section
N1 - 区画くかく
division, section, compartment, boundary, area, block
N1 - 区間くかん
section (of track etc)
N1 - 区切りくぎり
an end, a stop, punctuation