The phrase "untold secrets" is grammatically correct and can be used in written English.
It describes secrets that have not yet been revealed or spoken about. Example: The old mansion was said to hold many untold secrets, passed down through generations of the family who lived there.
Does he have access to the firm's previously untold secrets?
I essentially invite strangers to anonymously send me untold secrets written on homemade postcards.
Throughout, the lecturer maintains an air of contemplative serenity, as though he has discovered untold secrets of the universe.
New York's cliff-dwellers have long found inventive ways of customizing their living spaces, and untold secrets lie behind the city's apartment doors.
Those who stumble upon these works can take a few minutes or more to muse upon the artists' intent and inspiration — and perhaps glean some untold secrets, since the images are from games yet to be released.
"That is one of the great untold secrets for any given agency," Neil Gray, the director of government affairs for the Washington-based International Bridge, Tunnel and Turnpike Association, said about toll cheats.
"The untold secret about Jodi is she has a killer sense of humor," she said.
Dr. William Haseltine, the chief executive of Human Genome Sciences, said he agreed with today's statement because raw genomic data "has no practical use," an observation that he termed "the biggest untold secret of the human genome project".
It was a dazzling creation, mapping out an untold "secret history" which connected the Sex Pistols, the Dadaists, the Parisian événements of 1968, that legendary subversive clique the Situationist International and an Anabaptist revolt in 16th-century Germany, led by a notorious libertine named John of Leyden.
The flaw in the express consignment clearance system is apparently an untold secret.
But before you make up some lame excuse to get out of a committee position, consider this untold secret of graduate education: Professional development does not only occur in the classroom or the laboratory.
