慣かん性せい系けいMeaningsNoun1. inertial system; inertial frame of referenceKanji used慣get used to性nature (of a person)系lineagePitch accentかんせいけいComposed of慣かん性せいinertiaNoun系けいsystem; lineage; group; corollary; system (range of strata that correspond to a particular time period); (taxonomical) seriesNoun