Sentence:  His son Sidhartha had <WSD>renounced</WSD> material life and gone forth in search of enlightment. He received enlightment under a Bodhi tree at Gaya and became Buddha. Ashoka visited Gaya along with Upagupta and had darshan of Sambodhi. 
Meaning of the word marked with <WSD> tags:  To abandon, forsake, discontinue (an action, habit, intention, etc), sometimes by open declaration.