unimpeachable

Meanings

• beyond doubt or reproach;
• "an unimpeachable source"
• free of guilt; not subject to blame;
• "an unimpeachable reputation"
• completely acceptable; not open to exception or reproach;

Synonyms

• blameless
• inculpable
• irreproachable
• unexceptionable

unimpeachable is not valid in Words With Friends