루

Noun

 * 1) rampart, military wall
 * 2) baseball base

Etymology 2
Korean reading of various Chinese characters.

Usage notes
In South Korea, the hanja above are read as when used as a single word or as the first syllable of a Sino-Korean compound. However, the reading is retained when the hanja is not part of the first syllable of a Sino-Korean compound. This is known as (頭音法則, dueum beopchik).