i

Is the headword (the key or principal noun in a noun phrase) generic or specific? (Use the plural as needed, as above.)
i.i Countable/Singular:
The headword is countable:
The headword is singular:
Use a/an
i.ii Uncountable:
The headword is uncountable:
Use no article and no ending
i.iii Plural:
The headword is plural:
Use no article (plural form as required)