wraith

The word wraith appeared in Scottish English in the early 1500s, and its etymology is genuinely unclear. It may derive from Old Norse vordr ('guardian' or 'watcher'), a protective spirit that accompanied a person through life. It may connect to Scottish Gaelic arrach ('apparition'). Or it may be from an unrecorded Scots word. Etymologists are honest about the uncertainty. The ghost word has a ghost etymology.

In Scottish tradition, a wraith was specifically the apparition of a living person seen as an omen of their imminent death. You didn't see wraiths of strangers. You saw the wraith of your brother, your mother, your friend — and then you waited for the news. The specificity is what makes the wraith distinct from a ghost. A ghost is the dead. A wraith is the dying, appearing somewhere they are not.

Walter Scott popularized wraith in his 1816 poem 'The Lord of the Isles' and in his novels. By the mid-19th century, the word had entered general English usage beyond Scotland, losing some of its specificity. A wraith became any ghost, particularly a thin, pale, insubstantial one. The death-omen meaning faded. The atmospheric quality — something thin and fading, barely there — remained.

Tolkien's Ringwraiths in The Lord of the Rings (1954) gave the word its most famous modern usage. His nine Nazgul — kings corrupted by rings of power into faceless, robed specters — are wraiths in the sense of beings faded beyond visibility, present but not fully material. Tolkien, a philologist, would have known the Scottish death-omen meaning. His wraiths are kings caught between life and death, which is exactly where the original wraith stood.