1- Assure / Ensure / Insure
Assure means to tell another person something to remove doubt or anxiety.
(a) I assure you that the water here is perfectly safe to drink.
After assure, we always have a person: assure you, assure him/her, etc.
Ensure is something you do to guarantee a specific result.
(a) Please send the document by express mail to ensure that it arrives on time.
Insure is used when you get a financial plan to pay for any damage or loss to a person or thing.
This is related to the word insurance, such as health insurance, car insurance, etc.
(a) Our house is insured against fires, floods, and theft
2- Appraise / Apprise
The verb appraise means to evaluate, especially in an official way in which a grade will be given or
the value of something determined:
(a) A car dealership appraises the value of used cars.
The noun form is appraisal, meaning an evaluation:
(a) Please give me your honest appraisal of the book I’ve written.
The verb apprise means to inform or notify. You can apprise (someone) of (some news).
(a) Please keep me apprised of this situation
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