下士

Noun

 * 1) corporal (U.S. and British Army, British Air Force, U.S. and British Marine Corps)
 * 2) petty officer third class (U.S. Navy)
 * 3) petty officer second class (British Navy)
 * 4)  person, especially a member of the educated social classes, who is of inferior standing, intelligence, or ethics

Verb

 * 1)  to move an adviser  back one step diagonally

Etymology 2
Literally, "to lower oneself to the level of the shi (low-ranking persons just above the commoners)". Typically refers to efforts of promoting or socialising with people without discrimination regarding social hierarchy.

Verb

 * 1)  to display humility and respect towards lower-class persons

Noun

 * 1) a person of poor upbringing and character
 * 2) a low ranking samurai
 * 3)  a non-commissioned officer