久
キュウ, ク, ひさ.しい, きゅ, わ
long time, old story
JLPT2 G5 S3 F688
The relevant seal inscription form shows an aged/long-lived person with a curved back (compare 老) + a line indicating a stick on which the person leans. *Long (time)* and *long duration* are associated meanings, likened to the longevity of an aged person.
[Full Kanji Etymology List]