free+from+error
131unerring — [un ʉr′iŋ, uner′iŋ] adj. 1. free from error 2. not missing or failing; certain; sure; exact unerringly adv …
132valid — [val′id] adj. [Fr valide < L validus, strong, powerful (in ML, valid) < valere, to be strong: see VALUE] 1. having legal force; properly executed and binding under the law 2. well grounded on principles or evidence; able to withstand… …
