lacking pathways; "trackless wilderness"; "roadless areas"

To present participles which come from intransitive verbs, or are themselves employed as adjectives, to mark the absence of the activity, disposition, or condition implied by the participle;

An argument, variable, or local variable that contains a garbage collection pointer but whose lifetime information is not available at runtime. Untracked locations are assumed by the garbage collector to be live during the execution of the entire method body so they must be initialized by the prolog and must be either cleared at the end of their lifetime (if known) or when their contents might become incorrect.