toothless

adjectives

lacking teeth
"most birds are toothless"; "a toothless old crone"
toothless
antonym
toothed
is similar to
having few if any teeth
"anteaters are edentate animals"
edental, edentate, edentulate
is similar to
having lost teeth
edentulous
lacking necessary force for effectiveness
"a toothless piece of legislation"
toothless
is similar to
not producing an intended effect
"an ineffective teacher"; "ineffective legislation"
ineffective, ineffectual, uneffective