Select the option that can be used as a one-word substitute for the given group of words/phrase.

Eternal; lasting forever or indefinitely

perpetual

The one-word substitute for eternal; lasting forever or indefinitely is perpetual.

• Permit means to allow or give permission for something to happen.
• Perplex means to confuse or puzzle someone.
• Perpetual means lasting or existing for an indefinitely long time.
• Perpetrate means to commit or carry out a crime or other wrong.

Perpetual is the most appropriate word for this group of words because it specifically refers to something that lasts forever or indefinitely. The other words do not have the same connotation of unending time.