経年 けいねん Meanings Noun passing of years; lapse of time; aging; ageing Kanji 経 pass. Read as ケイ. 年 year. Read as ネン. Words containing 経年 経年劣化 (けいねんれっか) degradation over time 経年変化 (けいねんへんか) change over the years Jinuma: Japanese Dictionary · Word lists