ya.shan describes what is old in produce and a pool, and also occurs as the name of a gate.

The adjective use describes old produce kept for eating and an old pool; separately, a proper-noun form identifies the gate repaired in Nehemiah.

1. Old produce or pool · dominant

   In Leviticus 25:22, two masculine singular adjective forms occur in the instruction to eat old produce until the later produce comes in; the APB renders the clause with "the old produce" and "the old." Leviticus 26:10 likewise has two masculine singular forms where stored old food is eaten and brought out because of the new, while Isaiah 22:11 uses a feminine singular form in the phrase rendered "the old pool."

   Leviticus 25:22Leviticus 26:10Isaiah 22:11
2. Name of a gate · rare

   In Nehemiah 3:6, the proper-noun form occurs with "the gate" in the report that Joiada and Meshullam strengthened it; the APB renders this as "the gate of Yeshanah."

   Nehemiah 3:6

In the Anselm Project Bible: The APB presents the adjective occurrences with "old," "old produce," and "old pool," while Nehemiah 3:6 gives the proper-noun occurrence as "Yeshanah." These are verse-level renderings rather than definitions.