sackless
Sackless (adj) means not to blame; free of any wrongdoing.
Etymology
This word developed from Middle English sakles, sacless (“innocent”), which came from Old English saclēas (“free from charge, innocent, safe”), in turn from Proto-Germanic *sakalausaz (“free from accusation”); it is equivalent to sake + -less. It is cognate with Danish sagesløs (“blameless”), Swedish saklös (“blamesless”), Icelandic saklaus (“innocent”) and Faroese sakleysur (“unoffending, innocent”). See also sake, -less.