Word Origin & History
lieutenantlate 14c., "one who takes the place of another," from O.Fr. lieu tenant "substitute," lit. "placeholder," from lieu "place" + tenant, prp. of tenir "to hold." The notion is of a "substitute" for higher authority. Specific military sense of "officer next in rank to a captain" is from 1570s. Pronunciation
EXPANDwith lef- is common in Britain, and spellings to reflect it date back to 14c., but the origin of it is mysterious.
COLLAPSE