indispensable (adjective)
Meaning – absolutely necessary
Example of using it in a sentence: "Looking at your set homework is indispensable to making a start on it”
Synonyms: essential, vital, necessary, key, vital, needed, required, called for, requisite, important.
Spelling Tip – just remember it is “pens” and not “pend”
In + dis + pens + able
Use the word as many times throughout the week as you can. This can be verbally, in your written work or listen out for other people using it.