The phrase "adequately sure that" is correct and usable in written English.
You can use it when expressing a reasonable level of confidence or certainty about something.
Example: "I am adequately sure that we will meet the project deadline if we stay on track."
Alternatives: "reasonably confident that" or "sufficiently certain that".
They said they had satisfied themselves that it was "safely and adequately stored" and had made sure that "the weapons and explosives cannot be used without our detection".
Yet whatever the cruise industry's progress in safeguarding the environment, Mr. Conway said it is necessary to keep up the scrutiny to prevent backsliding and to be sure that laws adequately protect the environment and human health.
But also because I wanted her to feel that I was thinking about her in a personal way, and I wasn't sure that could adequately be conveyed by machine-made letterforms.
Let's make sure that they are adequately fed for that and able to take up the challenge.
"We will be working internally, with professionals and with Ticketmaster, to make sure that fans are adequately protected," he said.
And they need to make sure that they're adequately covered for liability, theft and damage claims, and that their subcontractors are licensed and insured.
When he was a little boy, his I.Q. was scored at 178, and his parents decided to make sure that he was adequately engaged and challenged.
Senior Justice Department officials held a meeting in November 1997 to make sure that Mr. Abdel Rahman was adequately attended, "so there would be no retaliation," Mr. Fitzgerald said.
The system failed him when those officers apparently didn't even value his dead body enough to adequately canvass the complex to make sure that no one was missing a teen.
The police have created 30 committees within the department to address the myriad security concerns, including transportation around the city, safeguarding the 49 hotels that will house officials, delegates and news media, safeguarding the restaurants, theaters and other entertainment sites and making sure that officers are adequately trained to handle it all.
