The phrase "adequately filled" is correct and usable in written English.
It can be used to describe something that has been filled to a satisfactory or acceptable level, often in contexts like forms, containers, or spaces.
Example: "Please ensure that the application form is adequately filled before submission."
Alternatives: "sufficiently completed" or "properly filled".
But the Tar Heels knew Haywood would be leaving, and they have not adequately filled the vacancy with recruits.
The blanks between him sitting in Ricky's chair to leaving town altogether are never adequately filled in.
But when Domínguez finally retired – he said he was going in 2000 but didn't leave until 2003 – he left a vacuum which has never been adequately filled.
This hole was never adequately filled in, leaving the recovery slow and still-incomplete a full seven years after the recession began.
Weak links It's hard to be confident that the gap left by Kanté has been adequately filled: despite his treachery, we're really going to miss him.
It was well accepted and adequately filled in by the patients.
By its very dry balmy beauty it altered the future by not adequately filling the reservoirs that supply the region's water.
But, as Carson did more hemispherectomies, he realized that the brain's own drip of cerebrospinal fluid could adequately fill the cavity.
But the medical profession has thus far failed to adequately fill in the gap left by doctors who no longer make house calls or answer the phone 24/7.
For the Knicks, the ultimate off-season prize remains Chris Webber, but there is another frontcourt player on the market who would adequately fill Latrell Sprewell's demand for increased "size and toughness".
But while the Orthodox Church has become an increasingly powerful presence in Russia, speaking out on morality, economics, international relations, and most recently the Russian elections, critics say it has failed to adequately fill a post-Soviet ideological and moral vacuum.
