Main entry: toothless
Definition: lacking teeth
Usage: most birds are toothless; a toothless old crone
Antonyms: toothed
Definition: having teeth especially of a certain number or type; often used in combination
Main entry: toothless
Definition: lacking necessary force for effectiveness
Usage: a toothless piece of legislation
Antonyms: effective, effectual, efficacious
Definition: producing or capable of producing an intended result or having a striking effect