Sad

Sad means unhappy.

It's sad to see they broke up.

It's sad that the coronavirus killed so many people.

desolate

Desolate describes destruction during natural disasters, like hurricanes and tornadoes. It can also describe empty, lonely places. In addition, it can also mean a sad, lonely, hopeless feeling.

Everyone felt desolate when the tornado destroyed their homes.

She felt extremely desolate when her husband died.

She felt desolate when her boyfriend abandoned her.

The town was desolate, the trees lost their leaves, the flower was dreary, and there was chilly wind.