Holophrasis

Holophrasis - expressing a complex idea in a single word or simple phrase.  

Oblige

Oblige:  1: To constrain someone or something by physical, moral or legal force or by the Exigencies of the circumstances. 

I am obliged to care for my patients while they are under my care.

2: To put someone in your debt by favor or service.

Exigent

Exigent:  Something requiring Immediate attention.  Requiring much.  Demanding

These are exigent circumstances. 

Obfuscate

Obfuscate - To darken or make obscure - to confuse or to be evasive, unclear or confusing.  The candidate did everything he could to obfuscate the issues.

serendipity

Serendipity - the phenomenon of finding valuable or agreeable things without searching for them. Especially when you are trying not to find them. Ours was a serendipitous meeting as I did not want to find someone to fall in love with.

Acidulous

Acidulous - I was reading a book and came across this wonderful word.  It means to be sharp or harsh is taste or manner.  What a delightful way to say someone has a nasty personality and they probably won't even know what you are talking about.

Sanguine

Sanguine - Basically it means bloody or bloodthirsty.  It can also refer to the bright red color - blood red.  It can also refer to a  ruddy complexion.  There is also the old body humor approach to personality - the sanguine type is marked by high color, sturdiness and cheerfulness.  Confident and optimistic people are also referred to and sanguine.  It is an interesting word, and it's roots go back to Middle English from the Latin sanguineus