a. [ Pref. il- not + lapsable. ] Incapable of slipping, or of error. [ R. ] [ 1913 Webster ]
Morally immutable and illapsable. Glanvill. [ 1913 Webster ]
a. Not liable to relapse; secure. Dr. H. More. [ 1913 Webster ]
a. Lapsible. Cudworth. [ 1913 Webster ]