Leaded
Part of speech: verb
Definition: To cover, fill, or affect with lead
Part of speech: adjective
Definition: Held on place by strips of lead. Containing or treated with the element lead.
Antiknock
Part of speech: noun
Definition: such a substance, usually tetraethyl lead.
Part of speech: adjective
Definition: of an additive added to petroleum/gasoline to reduce the occurrence of engine knock.