Ha, that's a difficult thing to believe.

Incontrovertibly, an intelligently increased vocabulary is a good thing.

Jargon, whether it is medical, IT, or connected to some other profession, often needs explanation in day-to-day situations.

Keep in mind that not everyone has your particular set of experiences and interests and be prepared to explain your words from time to time, and you'll be fine!

Luckily, it's often possible to explain things without using jargon, as long as you think about what you really want to say.

Moreover, since many words mean similar things even in ordinary speech, we can use those if our first choice of words isn't clear.

Nearly always, the meanings of words can be found on Internet, or in most libraries, which stock not only general English dictionaries but also dictionaries of medical terminology, accounting and other specialised career language.

Other than that, you can ask people - teachers, professors, authors - what a particularly difficult word means.

Particularly reckless or experienced vocabularists are tempted to guess from context what a word means.

Quite often, guessing from context will give the right answer, but you need to be more careful with filling in frequently met acronyms like QANTAS or Q(U)ANGO.

Right answers to such acronyms are good - but wrong answers can be amusing (if they're not embarrassing).

So, how can wrong answers be amusing?

That QANTAS acronym was an airline called Queensland And Northern Territory Air Service, but people will often misspell it as Quantas, not knowing it is an acronym.

Um, I think I must've come in at a bad time because I am completely confused as to what we are talking about.

Very confusing, but I think we're talking about acronyms.