Common Mistakes : inquiry

noun

.DUBIOUS: After making several inquiries I finally discovered his address
.GOOD: After making several enquiries, I finally discovered his address

: In a simple request for information, the usual word is enquiry
.We’ve had a lot of enquiries in response to the advertisement

: When you mean ‘a full investigation or a long serious study’, the usual word is inquiry
a court of inquiry
.There is to be an official inquiry into the cause of the crash