toothless

from WordNet (r) 3.0 (2006)

toothless
    adj 1: lacking teeth; "most birds are toothless"; "a toothless
           old crone" [ant: {toothed}]
    2: lacking necessary force for effectiveness; "a toothless piece
       of legislation"

from The Collaborative International Dictionary of English v.0.48

Toothless \Tooth"less\, a.
   Having no teeth. --Cowper.
   [1913 Webster]