House Of Representatives
noun
It's the institution that does deliberation on behalf of the populace. They represent the people. They are the house of representatives.
しゅうぎいん
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
ある衆議院議員が公費でボートを借りたことが明らかになりました。
It was revealed that a member of the House of Representatives chartered a boat at government expense.