For whoever holds love and compassion in high esteem, the practice of tolerance is essential, and it requires an enemy.
Sputnik had two, connected consequences for the United States, both of them essential for the world we now live in.
Gaddafi issued warnings to President Obama and other world leaders, writing that Gaddafi is an essential ally against al Qaeda.
We're saying nothing - except its nice and baggy in all the essential places, isn't it?
For them, apartheid was an essential part of the South African regime.
Comparison was considered an essential property of a perfect device.
They are contagious, not as cholera is contagious, but contact with others is essential to them.
The machine must be immensely strong, and yet it is essential that it should be light.
A man and a woman are essential to the execution of the panel game.
But, functionally, the essential thing about this value is its dynamic character.
mid-14c., "that is such by its essence," from Late Latin essentialis, from essentia (see essence). Meaning "pertaining to essence" is from late 14c., that of "constituting the essence of something" is from 1540s; that of "necessary" is from 1520s. Essentials "indispensable elements" is from early 16c. Related: Essentially.
essential es·sen·tial (ĭ-sěn'shəl)
Constituting or being part of the essence of something; inherent.
Basic or indispensable; necessary.
Of, relating to, or being a dysfunctional condition or a disease whose cause is unknown.
Of, relating to, or being a substance that is required for normal functioning but cannot be synthesized by the body and therefore must be included in the diet.
Something necessary or indispensable.