A single word that can be defined as (or otherwise signifies)'too important to be done without' is 'necessary.' When and where something is 'too important to be done without,' that same something is 'necessary.'
One word.
Yes, it is. It means the amount of work to be done by someone or something. "The student had a heavy workload this semester."
Yes, the word 'work' is a noun, a verb, and an adjective.The noun 'work' is a word for the use of one's strength or ability to get something done or to achieve a result; a job for which one is paid; the place where one does their job; something that someone makes; a word for a thing.Example uses:The work will be done on Monday. (noun)We can finish this if we work together. (verb)Where are my work gloves? (adjective)
Volenteer
It is used as a single word. Compound adjectives with the -ed form are always hyphenated or spelled as one word. (Absent-minded is occasionally found as a single word without a hyphen.)
habit
That is the correct spelling of the Latin word, used in English as a legal phrase "in absentia" (done without one's presence).
One word.
End, don, one,
When you rearrange the letters: new door = one word
One word for gathering important information is, "Research".
Both are equally important, as one cannot have one without the other.
There are many versions of Word and many types of computers that it runs on. If you have a document made in one version, you may want to be sure that you can open it on other versions without losing anything. So compatibility becomes important then.
The word for important in Japanese is "大切 (taisetsu)" or "重要 (juuyou)."
achieved
There is one syllable.
Limitless