intestable,adj.1. Not capable of being tested <an intestable DNA sample>.2. Legally incapable of making a will or of benefiting under a will <an insane person is intestable in all states> <the slaying-statute makes killers intestable in relation to their victims>.3. Disqualified from giving evidence, esp. testifying <the witness is intestable because of extreme youth>.

[Blacks Law 8th]