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There are several ways to disregard changes in the lifecycle of Terraform:

1. Use the Terraform state file to ignore changes: When applying changes, Terraform compares the current state to the desired state to determine what actions are necessary. If you want to ignore some changes, you can update the state file manually to match the desired state.

2. Use Terraform ignorechanges attribute: Terraform has an ignorechanges attribute that you can use to specify which resource attributes to ignore during updates.

3. Use Terraform taint command: The taint command marks a resource as "tainted," which causes Terraform to destroy and recreate it on the next apply. You can use taint to force a resource to be recreated with the desired state, ignoring any changes that were made.

4. Use Terraform plan -target: You can use the -target option with the plan command to specify only the resources that should be changed. This can help you avoid unintended changes to other resources.

5. Use Terraform undo: The undo command allows you to roll back changes made in a previous Terraform apply. This can be helpful if you accidentally applied changes that you want to disregard.