Another set of words to help you beautify your language.

something absolutely clear- Explicit
The clauses mentioned in the contract are explicit and immutable.

something that can be easily broken- fragile
You must be careful with the parcel; it contains things that are fragile.

something which is absolutely necessary- indispensable
Low pressure and temperature difference are indispensable factors for rains to occur.

that which is sure to happen and can’t be avoided- Inevitable
Death is inevitable.

to paralyze with shock and fear- petrify
I was petrified on hearing the news of his son’s kidnapping.