后备箱
hoù bèi xiāng · HSK 7
trunk
🚗🧳 后备箱 = 后 rear + 备 spare/reserve + 箱 box = the rear storage box of a car
后 means rear/back, 备 means reserve or spare, and 箱 means box or case. Stack them and you get the rear spare-box: the trunk where you stow luggage. 箱 also shows up in 箱子 (suitcase).
后 — 厂 cliff + 一 + 口 mouth
Originally depicted a ruler or sovereign issuing commands, showing a figure with a mouth giving orders. It came to mean 'queen' or 'empress.' In modern simplified Chinese, 后 also absorbed the meaning 'behind/after' from the traditional character 後, so context decides which sense applies.
箱 — bamboo radical 竹 + 相 (xiāng) phonetic
A semantic-phonetic compound. The bamboo radical 竹 on top signals the original meaning: a box or chest woven from bamboo or made of wood. The component 相 below supplies the sound 'xiāng'. Over time the meaning broadened from bamboo containers to boxes and cases of any material.