Meaning

noun a soft silver-white univalent element of the alkali metal group; the lightest metal known; occurs in several minerals

noun Chinese distance measure; approximately 0.5 kilometers

adjective being one more than fifty

originAn early romanization of Chinese Mandarin 里 (lǐ). As a Korean unit, via the Yale romanization of Korean 리 (ri), from the Chinese distance.

Etymology from Wiktionary, CC BY-SA 3.0