Could you help me take down my luggage?
This word consists of kanji with hiragana attached. Because the hiragana ends with an う sound, you know this word is a verb. You already learned that 降りる means "to get off." This is when you're helping something else descend down from something, not when you yourself are getting down. So it means to take down or to lower.
This word uses the kun'yomi reading, which you already learned. Go you!