I was writing a letter and I wonder whether the usage of interested in a formal letter could be considered as a formal word. Also if there are synonyms which are more appropriate to use in formal letters.
closed as unclear what you're asking by Hot Licks, Jason Bassford, Cascabel, J. Taylor, jimm101 Feb 11 at 15:39
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"Interested" can be used in pretty formal situations and contexts:
The Czech Republic would be very interested in becoming a member of the Special Committee.
Some delegations said that they would be very interested in looking further into that proposal.
Another delegate felt that providers of capital would be very interested in this type of information.
And it can also be used in rather informal ones:
I don't think she'd be very interested in a guy like me.
All in all, "interested" is a neutral word, and it's often used in formal letters.