gi.lah denotes rejoicing as an expressed state, paired with singing and assigned to Jerusalem in the cited verses.

The attested use denotes rejoicing as a named state: it occurs alongside singing in Isaiah 35:2 and is used of what Jerusalem is being created as in Isaiah 65:18.

1. Rejoicing as a named state · dominant

   In Isaiah 35:2, the construct form occurs in the clause that joins rejoicing with singing; the APB renders the verse, “It will indeed sprout and rejoice with rejoicing and singing.” In Isaiah 65:18, the absolute form appears in the statement about creating Jerusalem; the APB renders it, “I am creating Jerusalem as rejoicing and her people as joy.”

   Isaiah 35:2Isaiah 65:18

In the Anselm Project Bible: The APB presents the relevant clauses with “rejoicing” in both Isaiah 35:2 and Isaiah 65:18, though it is a whole-verse translation.