Plural of crisis?

Crisises or crises?

Crises. Similarly thesis/theses. Is it all Greek to you then?

So Greek loanwords ending in -is form their plural with -es. Thanks.

<<So Greek loanwords ending in -is form their plural with -es. Thanks. >>

At least "crises", "theses", and "parentheses" do. In English, there's usually an exeption or two to any rule or two.

kraɪsɪs (singular)
kraɪsiz (plural)

At least "crises", "theses", and "parentheses" do. In English, there's usually an exeption or two to any rule or two.


Ok, let's find exceptions to this rule. I think that there are not many words like these in English, so it is possible that the rule has not exceptions .

Where are you from, Armada?

I'm from Europe. "Basis", despite not being a Greek derived word, also follows the same pattern: plural "bases". So the rule seems pretty consistent so far. Another question, are there words in English whose singular and plural forms are the same?

I'm from Europe too, I mean what's your native language? Spanish?

<< Another question, are there words in English whose singular and plural forms are the same? >>

There are quite a few like this:

deer -> deer
fish -> fish

<<So the rule seems pretty consistent so far.>>

I think proper names ending in "is" for their plural normally:

"We had a good turnout for the Elvis Presly impersonation contest -- more than 100 fake Elvises turned out."

Speaking of Elvis, once known as "Elvis the pelvis", the plural of "pelvis" is either "pelves" or "pelvises".

penis => penises

Penis is not a Greek derived word.

Armada or Franco is a fascist Spaniard. Plurials must be really hard for him since the Spanish ones are a breeze....