IMPREZA is derived from the English word "impresa", which means like "crest, maxim". IMPREZA was also named with the meaning of "the car with an added impression of youth, lightness and sportiness", and "giving a fresh impression to a new era."
WRX is a combination of "WR" of WRC and "RX" used as LEONE's sports grade name.
STi stands for "SUBARU TECNICA INTERNATIONAL INC.". Previously, the product was labeled "STi", included lowercase "i". From April 25, 2005, the product has been labeled "STI", which is the same as the abbreviation of company name.