“I’m an alumni.”
Really? How many of them are you? What was it like being a students?
The forms of this word don’t really have to be difficult. Of course, you could simplify everything and say “one alum, two alums,” but that’s cutting corners. And if you want to sound like an ignoramus, try using “one alum, two alum.”
But here are the true-to-Latin forms:
(or gender neutral)
Of course, you are free to do whatever you wish. If you freestyle, though: others might believe that you are no alumnus/alumna from anywhere.
Image source: http://leedsunicareers.files.wordpress.com/2014/06/flickr-4647211575-hd.jpg
What’s the plural form of the word ‘octopus?’ Many would respond with “Ah, I know! It’s not octopuses… it’s octopi, right?!”
Not really, no.
Octopus is formed from the Greek words ὀκτώ ‘okto’ eight and πούς ‘pous’ foot. In accordance with Greek rules, it should be pluralized as octopodes.
Some people assume incorrectly that it is a Latin word (like stimulus or cactus) and should therefore take the Latin 2nd declension plural octopi (analogous to stimuli and cacti). Since this is based off a bad assumption, most prescriptive dictionaries do not accept ‘octopi’ as a valid form.
According to English rules, it should pluralize to octopuses, which is equally acceptable as octopodes according to prescriptivists. Octopuses is more common than octopodes in actual English usage.
You can verify the above this using the Online Etymology Dictionary (or any reputable source, for that matter).
Image credit: http://marthamouse.files.wordpress.com/2011/08/octopus-group-photo.jpg