qnli question: What is the literal meaning of "healer?" sentence: In Apollo's role as a healer, his appellations included Acesius (/əˈsiːʒəs/ ə-SEE-zhəs; Ἀκέσιος, Akesios, from ἄκεσις, "healing"), Acestor (/əˈsɛstər/ ə-SES-tər; Ἀκέστωρ, Akestōr, literally "healer"), Paean (/ˈpiːən/ PEE-ən; Παιάν, Paiān, from παίειν, "to touch"),[citation needed] and Iatrus (/aɪˈætrəs/ eye-AT-rəs; Ἰατρός, Iātros, literally "physician").