fetii

Etymology
A pluralisation of by erroneous analogy with words like  and ; compare  and see the usage note below.

Noun

 * 1)   (the standard plural is ).

Usage notes

 * The plural form * is doubly incorrect. Firstly, derives from Latin’s fourth declension, meaning that its etymologically consistent plural form would be  — spelt the same but distinguished in pronunciation as  (it could also be spelt * or *, to show this); the  →  rule is a pattern of the second declension. Secondly, even if  were a second-declension noun, the plural form would be *; in the correct plurals  and, with which * is analogous, the first ‘i’s are part of the words’ stems ( and ), and not their case endings.