The archaeologist unearthed the ancient artifacts, delicately brushing away the layers of soil that had accumulated over centuries what context clues in the sentence best help determine the meaning of the word "unearthed?".

The context clues in the sentence that best help determine the meaning of the word "unearthed" are "delicately brushing away" and "layers of soil that had accumulated over centuries." These clues suggest that "unearthed" means to carefully remove or reveal something that was buried or hidden.