English for Today by Ganiu Abisoye Bamgbose (Dr GAB)
UNVALUABLE or INVALUABLE?
A person or thing is unvaluable when it has no value or has a negative value:
No one wants to be with an unvaluable partner.
A person or thing is invaluable when they are valuable beyond estimation; extremely useful:
The new job will provide you with invaluable experience.
She became an invaluable source of support and encouragement to me.
GAB
