He walked up and down the room.
Kare wa heya o achikochi aruita.
he; him; his; boyfriend
topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
room; apartment; flat; pad; chamber; stable
indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.
here and there; all around; everywhere; throughout; all over; to get things in the wrong order (back to front); to become muddled up
Readings: ヒ、 かれ、 かの、 か.の
Meanings: he, that, the
Readings: ブ、 -べ
Meanings: section, bureau, dept, class, copy, part, portion, counter for copies of a newspaper or magazine
Readings: オク、 や
Meanings: roof, house, shop, dealer, seller
Readings: ホ、 ブ、 フ、 ある.く、 あゆ.む
Meanings: walk, counter for steps