absolve, acquit, amnesty, antisepticize, autoclave, boil, chlorinate, clear, delouse, destigmatize, discharge, disinfect, dismiss, dispense from, exculpate, excuse, exempt, exempt from, exonerate, forgive, free, fumigate, give absolution, grant amnesty to, grant immunity, grant remission, hygienize, justify, let go, let off, nonpros, pardon, pasteurize, purge, quash the charge, release, remit, sanitate, sanitize, set free, shrive, sterilize, vindicate, whitewash, withdraw the charge

For further exploring for "decontaminate" in Webster Dictionary Online

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TIP #08: Use the Strong Number links to learn about the original Hebrew and Greek text. [ALL]

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