Words like mother and love often appear on lists of beautiful English words. But so do defenestration and lollygag. Obviously, they are not all chosen for the same reason. Some words tug at the heart, some pique the mind and others are simply euphonious. Perhaps the strangest member of the last category, the purely harmonious, is the otherwise ordinary phrase cellar door.

The claim that cellar door is beautiful to the ear — in opposition to its prosaic meaning — has been made by and attributed to a wide variety of writers over the years. “Poetry, in fact, is two quite distinct things,” H. L. Mencken wrote in a 1920 magazine column. “It may be either or both. One is a series of words that are intrinsically musical, in clang-tint and rhythm, as the single word cellar-door is musical. The other is a series of ideas, false in themselves, that offer a means of emotional and imaginative escape from the harsh realities of everyday.”

More recently, the superior sound of cellar door was mentioned in the 2001 movie “Donnie Darko,” in which a cellar serves as a time-twisting portal. In one scene, the main character, Donnie, sees the phrase on a schoolroom chalkboard. He asks his teacher why it’s on the board, and she explains that the words are thought to be especially lovely, vaguely attributing the idea to a “famous linguist.”

The fantasy writer J. R. R. Tolkien, who was also a philologist, might well be the linguist she had in mind. He mentioned the idea of cellar door’s special beauty in a speech in 1955 and is often given credit for it. Other supposed authors abound; the story is tangled. But Tolkien, at least, can be ruled out as the originator. He was, after all, just 11 years old in 1903 when a curious novel called “Gee-Boy” — which also alludes to the aesthetic properties of cellar door — was published by the Shakespeare scholar Cyrus Lauron Hooper. Hooper’s narrator writes of the title character: “He even grew to like sounds unassociated with their meaning, and once made a list of the words he loved most, as doubloon, squadron, thatch, fanfare (he never did know the meaning of this one), Sphinx, pimpernel, Caliban, Setebos, Carib, susurro, torquet, Jungfrau. He was laughed at by a friend, but logic was his as well as sentiment; an Italian savant maintained that the most beautiful combination of English sounds was cellar-door; no association of ideas here to help out! sensuous impression merely! the cellar-door is purely American.”