The phrase "adequately maintain" is correct and usable in written English.
You can use it when discussing the proper upkeep or care of something to ensure it functions effectively.
Example: "To ensure the longevity of the equipment, it is essential to adequately maintain it on a regular basis."
Alternatives: "properly sustain" or "sufficiently care for".
She said BP Alaska admitted that itfailed to adequately maintain its pipelines.
And they have disputed the assertion of some experts that the authority had failed to adequately maintain the fireproofing.
A lack of investment means we are really struggling to increase road capacity, let alone adequately maintain what we already have," said John Cridland, CBI director-general.
He focuses on underfinanced education, especially in the desperate villages that lack the resources to adequately maintain and supply their tumbledown schools.
Even as more strain was being placed upon the rail system, however, the non-industrialized South was less and less able to adequately maintain or repair them.
"It's more important right now for the city and the state to tell us how they're going to fund the nearly $12 billion the M.T.A. needs to adequately maintain the system over the next five years".
They are fast (when adequately maintained) and have high capacity but are expensive to build.
Massey officials denied culpability, claiming that a sudden seepage of natural gas "overwhelmed" an adequately maintained ventilation system.
Results show that in each simulation, the physiological variables of mean arterial pressure and systemic flow are adequately maintained.
The only way to better educate our children is by having smaller classes taught by well-trained and well-paid teachers using updated materials in adequately maintained buildings.
The road system has not been adequately maintained since the mid-1990s, and much of it has fallen into a state of disrepair.
