[{"Bold_text": "verb (used with object)", "List Items": ["to take or gather (something usable) from discarded material.", "to cleanse of filth, as a street.", "to expel burnt gases from (the cylinder of an internal-combustion engine).", "Metallurgy.to purify (molten metal) by introducing a substance that will combine chemically with impurities."]}, {"Bold_text": "verb (used without object)", "List Items": ["to act as a scavenger .", "(of an engine or cylinder) to become scavenged of burnt gases.", "to search, especially for food."]}]