Aggressiveness or aggressivity

Hi Nemessos,

Both of your sentences are grammatically correct, and there's no difference between them. All you've done is just used two different, completely interchangeable noun forms of the adjective 'aggressive'. The meaning doesn't change a whit.

"Aggressivity" is rare and archaic. I would not use it these days.
"Aggression is one of his shortcomings" OR "His aggressive attitude is one of his shortcomings".

Hi Nemessos,

In the UK at least, people are very much more likely to use 'aggressiveness' than 'aggressivity' in this sentence, but it could well be that 'aggressivity' is more widely used in American English.

By the way, more natural English for 'I need some enlightenments' would be 'I need enlightening'.

Thank you so much Skrej, Feebsh and yizhivika. I really appreciate your prompt replies which are really helpful.

how to say the sentence in a more native style?
thank u!

See the comments by Feebs. They are very natural.

Actually, depends on the subject-matter. Aggressivity is used a lot in psychoanalysis and its meaning is a bit divergent from just aggression.

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Whether you use 'aggressiveness' or 'aggressivity' is a question of register.

In conversation you might say; 'Aggressiveness is one of his shortcomings'.

Whereas, in a medical article you would write; 'Aggressivity is a symptom of this disorder'.

Finally, the first possessive pronoun is redundant, as it is clear whose 'aggressivity' is in question.

I am neither native UK English speaking nor American English speaking, I do have a French language background. To me, aggressivity is a tendency, a disposition to be aggressive, and aggressiveness is the action of being aggressive. There should be some distinction in the 2 words, otherwise why have 2 words for exactly the same meaning?