お腹
おなか · onaka · JLPT N5 · noun
stomach
🍚 お腹 = polite o + naka (inside): your honourable middle
O is the polite prefix and naka means inside or middle, so onaka is literally the honourable inside. The kanji 腹 means belly. Onaka ga suita, my inside has emptied, is how you say you are hungry.