エイ 
なが.い 
() eternity () eternal () long
えいえん (adj-no,adj-na,n) eternity, perpetuity, immortality, permanence
えいきゅう (adj-na,n,adj-no) (1) eternity, perpetuity, immortality, (2) Eikyuu era (1113.7.13-1118.4.3)
えいじゅう (n,vs) permanent residence
えいぞく (n,vs,adj-no) permanence, continuation
えいたい (n) permanence, eternity

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Etymologies: 中文字譜 : 説文解字