Do you use 'a' SJW or 'an' SJW?

You need to use ‘an’ before SJW.

It’s not about the vowel or consonant in the beginning of the word; it is about how the first letter of the word is pronounced.

SJW – es-je-double-yu – Starts with a vowel sound – requires an ‘an’ before the word.

MBA – em-bi-e – Starts with a vowel sound – requires an ‘an’ before the word.

Manager – ma-ne-jar – Starts with a consonant sound – requires an ‘a’ before the word.

Europe – yu-rop – Starts with a consonant sound (y) – requires an ‘a’ before the word.

PhD – pe-eich_de Starts with a consonant – requires an 'a' before the word.

I have found a good link on appropriate article use in English. How to Use Articles (a/an/the)

How can the word 'perambulate' be used in a sentence?

To quote Sir Alec Guiness, as the character Obi Wan Kanobi in the first Starwars movie. . .

That's a [word] I haven't heard in a long time.

Actually, the only time I ever remember someone using that word was in some gigantic software behemoth. It contained A module called “Perambulator.”. I remember looking the word up in a dictionary (yes, it was that long go) and thinking “eeeeewwww, aren't we clever?”

How to use the word “affinity” in a sentence

Examples first, then definition below them. The given definitions are the most relevant for each sentence above them, and are the most useful definitions because they cover pretty much every way they will ever be used in society as of May 20th, 2016.

I am good with calculations and I love doing them, so I have an affinity for math.

  • a quality that makes people or things suited to each other
  • an attraction to something

My sister loves volleyball, so she has an affinity for it.

  • an attraction to something

Bats have an affinity for darkness.

  • an attraction to something
  • a quality that makes people or things suited to each other

My mom has an affinity for kind intellectuals because she loves smart people who constantly question things but aren’t buttholes about them.

  • an attraction to something
  • a quality that makes people or things suited to each other

Source: Definition of AFFINITY

How is the word 'fortitude' used in a sentence?

The word “fortitude ” is derived from the root “fortis,” which means a symbol of strength. Therefore, fortitude means strength, mental or physical, especially during times of hardship.

A usage sentence can be “ With perseverance and fortitude, a common man can move mountains.”

How would you use the word 'tryst' in a sentence?

At the time that the politician Newt Gingrich was publicly assailing President Bill Clinton for having an extramarital affair, Newt was having trysts with a woman other than his wife. There is no doubt at all that these trysts involved adultery.

Why are people afraid / hesitant to use the word 'breast', and instead, say, 'bosom', or 'bust', or 'chest'?

The reason why any of these word would be used in place of “breast” can be either due simply to personal choice, or there could be a level of immaturity about it, much like how many people avoid the word “moist”.

That aside, it could also be because they are using these words for their more exact/traditional definition.

“Breast” is a rather broad term that can refer to pretty much everything in that general region in the body. Thus we have words like breastplate, which almost invariably (yes, I’m sure there were exceptions, but there were just that: exceptions) was meant for men, therefore having no connotation of a woman’s breasts (notice, it really only takes on this meaning when made plural).

“Bosom” is often used as a replacement, but it is actually more accurately used when referring to this region when bringing someone/thing into a welcoming, or nurturing embrace. Obviously, the image of a mother holding her child to her bosom has, over time, brought with it the connotation of a woman’s breasts, but this is not, necessarily, the original intent.

“Bust” actually extends beyond this region to include the head, originally used in sculpture. I believe, although I could be wrong, this is the term often utilized in tailoring, and thus has received a connotation for the breasts, for obvious reasons.

Whereas all the others generally refer to the exterior, “chest” technically refers to the internal portion of this region, but it has also taken on this same connotation as all others mentioned above, simply because it is that general region.