What is the opposite of blithe?

The opposite of blithe depends on which aspect of the word you're focusing on:

* If blithe means carefree and lighthearted, its opposite could be:

* Serious

* Solemn

* Grave

* Worried

* Anxious

* Gloomy

* If blithe means indifferent or unconcerned, its opposite could be:

* Concerned

* Attentive

* Careful

* Thoughtful

* Serious

* If blithe means cheerful and happy, its opposite could be:

* Sad

* Unhappy

* Depressed

* Melancholy

The most appropriate opposite will depend on the context in which you are using the word "blithe."