cabbiśa vatsara - for twenty-four years; prabhura - of the Lord; gṛhe - at home; avasthāna - residing; tāhāṅ - there; ye - whatever; karilā - He performed; līlā - pastimes; ādi-līlā nāma - are called ādi-līlā.

For twenty-four years, Lord Śrī Caitanya Mahāprabhu remained at home, and whatever pastimes He performed during that time are called the ādi-līlā.