Vocabulary

• Owe, verb (=essere debitore)         /əʊ/

Definition: to owe si defined as to have a debt or to feel the need to do
Structure it takes: to owe someone for something
Use case: "he owes me 5$"
Synonyms: to be in debt, ought to, to be indebted to someone

• Understatement, noun (=eufemismo)      /ˌʌndəˈsteɪtmənt/

Definition: it's a sentence which is far less than what is true
Use case: "understatement is a form of irony"
Synonyms: modest statement, restraint
Antonyms: exaggeration

• Conceal, verb (=nascondere)     /kənˈsiːl/

Definition: to conceal means to keep something hidden or secret
Structure it takes: to conceal from ..., to conceal behind...
Use case: "it is concealed by trees"
Synonyms: hide, keep from another's knowledge, keep secret
Antonyms: show
Related forms: concelment, concealer, concealable

• Takeover, noun (=acquisizione del controllo)     /teɪkəʊvə/

Definition: the act of assuming control or management or responsibility for something

Structure it takes: takeover of ...a company/a club

Use case:" takeover is the purchase of one company by another called bidder"

Synonyms: acquisition

• merger, noun (=fusione)    /ˈmɜːdʒə/

Definition: it's the union of two different elements (companies), it's something produced by mixing

Use case: merger proposals weren't enough realistic

Synonyms: union, combination, alliance, mix, fusion

Antonyms: separation, division

• firm, noun (=azienda, impresa, ditta)     /fɜːm/

Definition: it's a business company or a partnership of two or more persons

Use case: "small/ medium-sized firms"

Synonyms: business, company, corporation, enterprise

• morbid, adjective (=morboso, malato)   /ˈmɔːbɪd/

 Definition: it means "caused by desease" or "psychologically unhealthy"

Structure it takes: to be morbid for

Use case: "morbid curiosity"," morbid religious feelings", "morbid obsession"

Synonyms: macabre, grim, pathological

Antonyms: happy. cheerful

Prefixes-suffixes: morbidly (adv), morbidness (n)

• ingenuity, noun (=ingegnosità, abilità)     /ˌɪndʒɪˈnjuːɪtɪ/

Definition: ingenuity is the quality of being clever, creative

Use case: "never understimate the ingenuity of man"

Synonyms: imagination, inventiveness, ability to invent

Related forms: ingenious (adj)

Speaking assessment: business plan

I think the experience of last lesson was an important opportunity to learn the techniques of public speaking and improve our ability to present a plan. Our presentation was well organized and its structure was logical, but if I could try to present again a business plan, I would improve some aspects.
At first I would practice many times  in order to be more confident and have a more natural intonation. I didn't use enough signposting language so I would improve the use of formulas.
Then if I could present another plan I would add a bigger amount of information. Last lesson I forgot a part of my presentation, so I'd like to find a way to remember all the parts. For example I would use a sheet of paper with all the key words of my presentation.

Reading
10 GRAMMAR RULES YOU CAN FORGET: how to stop worrying and write proper

Guardian Grammar Blog http://www.theguardian.com/science/2013/sep/30/10-grammar-rules-you-can-forget

The article deals with some advices about grammar rules and it tries to explain that the "correct form isn't always the best". The author shows why we can forget rules such as "don't divide the particle to from the infinitive form" or" don't end a sentence with a preposition": we can infringe these rules if the result sounds more natural. So a colloquialism is often better than a grammatically correct form.
This conclusion is a consequence of the awareness of grammar rule changes: English is spoken by people all over the world and this language is so alive that it's ever changing. Actually all the spoken languages​​ undergo this process of renewal: for example Italian language today includes lots of neologisms taken from English such as "chattare" or "loggarsi".