寿
ジュ, ス, シュウ, ことぶき, ことぶ.く, ことほ.ぐ, かず, じ, じゅう, すっ, すみ, とし, としかつ, なが, のぶ, のり, ひさ, ひさし, やす

longevity, congratulations, one's natural life

JLPT0 G7 S7 F1245

The relevant seal inscription form is an abbreviated form# of 老 (aged person) + ridges surrounding a paddy or field → aged person following a long, curved ridge about a paddy/field → *longevity*; *long span* (← length of an aged person's lifespan) → *congratulations* (← celebration of long life).

[Full Kanji Etymology List]