1 completely necessary
In a large organization, good internal communication is essential.
essential for: Light is absolutely essential for the healthy development of plants.
essential to: He had acquired the skills essential to his later success in politics.
it is essential (that): It is essential that all equipment is properly maintained.
it is essential to do something: If you want to make major changes, it is essential to involve your staff.
essential reading: Her articles are essential reading for anyone interested in the war.
play an essential role/part in something: She has always played an essential part in the smooth running of the business.
Synonyms and related words