区切(くぎ)るto demarcate, to delimit, to divide (an area), to mark off, to cut off, to punctuate, to put an end to (e.g. a sentence), to insert pauses or breaks (e.g. when reading aloud)

カーテンで部屋(へや)を二(ふた)つに区切(くぎ)る。

To divide the room into two with a curtain. {to demarcate, to delimit, to divide (an area), to mark off, to cut off, to punctuate, to put an end to (e.g. a sentence), to insert pauses or breaks (e.g. when reading aloud)}

先生(せんせい)：「この文(ぶん)を文節(ぶんせつ)で区切(くぎ)りましょう。」

Teacher: 'Let's divide this sentence into phrases.' {to demarcate, to delimit, to divide (an area), to mark off, to cut off, to punctuate, to put an end to (e.g. a sentence), to insert pauses or breaks (e.g. when reading aloud)}

大学(だいがく)の一(いち)学年(がくねん)は前期(ぜんき)と後期(こうき)に区切られている。

A university's academic year is divided into the first and second semester. {to demarcate, to delimit, to divide (an area), to mark off, to cut off, to punctuate, to put an end to (e.g. a sentence), to insert pauses or breaks (e.g. when reading aloud)}

ルール：「ロープで区切(くぎ)ってあるレーンを越(こ)えて泳(およ)いではならない。」

Rule: 'You must not swim across the lanes that are marked off with ropes.' {to demarcate, to delimit, to divide (an area), to mark off, to cut off, to punctuate, to put an end to (e.g. a sentence), to insert pauses or breaks (e.g. when reading aloud)}

パーテーションか何(なに)かでこの広(ひろ)い会場(かいじょう)を三(みっ)つのブースに区切りましょう。

Let's divide this large venue into three booths with partitions or something. {to demarcate, to delimit, to divide (an area), to mark off, to cut off, to punctuate, to put an end to (e.g. a sentence), to insert pauses or breaks (e.g. when reading aloud)}