i.e.
Lower case, with two full stops. i.e. means “namely” or “that is”. (It’s an abbreviation of the Latin id est.) It does not mean “for example”. It’s not just another way of writing e.g.
The following sentence is incorrect:
If you are known by another name, enter it here, i.e. Scottie.
If you want to say “for example”, use the English for example or e.g.
IKEA
Block caps.
imposter, impostor
Use the –er spelling rather than the –or spelling.
Indian subcontinent
subcontinent – neither capitalised nor hyphenated.
in hock
Not in hoc.
innovation
An innovation is something new. “New innovation” is redundant.
inquiry
See enquiry, inquiry.
install
Install rather than instal.
internet
No initial cap.
Ireland
Call it Ireland or the Republic of Ireland, not Eire or southern Ireland.
-ise
Not -ize in words such as realise and organise.