KanjiJLPT N3
Salute

salute, bow, ceremony, thanks, remuneration

Mnemonic

Before the altar, a monk bows so deeply that his nose presses flat against the cold stone floor — the most profound salute imaginable. Only by touching your nose to the altar do the spirits accept your reverence as sincere.
Additional thoughts
Picture the physical act: nose meeting altar stone = ultimate bow of respect. The deeper the bow, the greater the courtesy. The altar setting grounds it in ritual propriety.
Quick recall
Press your nose to the altar stone in the deepest salute of reverence.

Details

The keyword for 礼 is salute. This kanji encompasses the broad concept of ritual propriety, courtesy, and respectful greetings. It refers to formal expressions of respect, politeness, and gratitude, as well as ceremonial rites and etiquette observed in social interactions. In essence, it captures the idea of showing proper reverence and decorum toward others, whether through a bow, a word of thanks, or adherence to established customs.
On'yomi
れい、らい