'unessential' is a correct word that can be used in written English.
You can use it to describe something that is not necessary or important. For example: "The meeting went on for hours, discussing unessential details."
As the war progressed there was a growing appreciation of the need for improved electrical communications of much greater capacity for the larger units and of the need within regiments for electrical communications, which had heretofore been regarded as unessential and impractical.
While the introduction of basic voice-recognition (and touchpad integration in the PS4 edition) does little to enhance the game in any meaningful capacity, the graphical consistency enabled by the latest generation of hardware makes this the essential version of a relatively unessential game.
Still, fears the inner city could flood have fueled an exodus as Thais and expatriates alike seek refuge outside Bangkok and foreign governments urge their citizens to avoid unessential travel to the threatened city.
The term obbligato accompaniment came to be applied to accompaniments of this type, as opposed to ad libitum accompaniment, the unessential ornamentation or the optional reduplication of a part, performed on a secondary instrument.
The process of framing is intended to eliminate what is unessential in the motion picture, to direct the spectator's attention to what is important, and to give it special meaning and force.
They have brooded on what they have to say for long enough, or are recalling it from a sufficient enough distance that the unessential things have fallen away.
And Norbert Dall, a land-use consultant in Sacramento who frequently works with the commission, said that while he thought the agency was "ridiculously underfunded," he did not object to spending limits for what he characterized as unessential litigation.
There was no secret to their success: the efficient teachers hewed closely to the curriculum, maintained strict discipline and minimized non-instructional activities, like conducting unessential classroom business when they should have been focused on the curriculum.
Traveling with our own toilet, mini-mart and motel room left us open to make unessential pit stops with little concern for time.
Amid a "food desert" and during a recession, one entirely unessential food type thrives -- sugary beverages.
It's not that she doesn't think about things so much as that her mind seems mostly filled with unessential bric-a-brac.
