גִּילָהgîylâh

rejoicing (Isaiah 65:18; Isaiah 35:2; Isaiah 9:2)

Pronunciation: ghee-law' · Hebrew/Aramaic (Old Testament) · H1525

Same root

גִּילgîyl · H1524a revolution (of time, i.e. an age); also joy

Where it appears

Appears 2 times in the Bible.

Isaiah 35:2 Yes, there will be an abundance of flowers and singing and joy! The deserts will become as green as the mountains of Lebanon, as lovely as Mount Carmel or the plain of Sharon. There the Lord will display his glory, the splendor of our God.
Isaiah 65:18 Be glad; rejoice forever in my creation! And look! I will create Jerusalem as a place of happiness. Her people will be a source of joy.

Source: Brown, Driver and Briggs, Hebrew and English Lexicon of the Old Testament (1906), public domain; markup by unfoldingWord, CC BY (github.com/unfoldingWord/Brown-Driver-Briggs-Enhanced).