前ぜん方ぽう互ご換かん性せいMeaningsNoun1. forward compatibility; upward compatibilityKanji used前in front of方way互mutual換exchange性nature (of a person)Composed of前ぜん方ぽうahead; forward; (in) front; having a square frontNoun互ご換かんinterchange; transposition; compatible (e.g. PC)Noun性せいnature (of a person); sex; gender; sex (i.e. sexual attraction, activity, etc.); -ty; -ity; -ness; -cyNoun