Unfortunate.
Unfortunately
misfortune
The opposite for a person would be lucky (fortunate). For an occurrence, it could be fortunate, propitious, or providential.
The opposite could be either fortunate or blessedor lucky.
The opposite of lucky is unlucky. However, an alternate answer could be that the opposite of luck is skillful. It depends on the context that is being considered.
The opposite of harmful would be helpful. You could also say beneficial or fortunate.
The opposite would be being happy, content, comfortable, fortunate, or satisfied.
The opposite of the word 'pitiful' is 'fortunate'.
It has sometimes been suggested that eucatastrophe be used as the opposite of catastrophe or disaster, but the word has never really caught on. The best we can do, to indicate the opposite of a disaster, is to describe an event as extremely fortunate. In some contexts the word breakthrough will convey that meaning.
I was fortunate to be born in this country. It is most fortunate that you arrived today.
More fortunate (comparative) and most fortunate(superlative).
more fortunate
Fortunate was created in 1998.
They were fortunate to make it out alive.