What is Dukkha?

What is Dukkha? No, it's not Ducca, a popular Italian restaurant & bar in San Francisco.  

From Wikipedia, the etymology for the word is: 

The ancient Aryans who brought the Sanskrit language to India were a nomadic, horse- and cattle-breeding people who travelled in horse- or ox-drawn vehicles. Su and dus are prefixes indicating good or bad. The word... kha, in later Sanskrit meaning 'sky,' 'ether,' or 'space,' was originally the word for 'hole,' particularly an axle hole of one of the Aryan's vehicles. Thus sukha … meant, originally, 'having a good axle hole,' while duhkha meant 'having a poor axle hole,' leading to discomfort.

LA TONTERIA

Now here we have a picture of "a poor hole which leads to discomfort."

My question is this: "Is this case of Dukkha necessary for both parties?"

While Existential boredom and pain is real and unavoidable,  as human,

unnecessary suffering such as this should always, always be... optional.