What is the opposite word of funny?

The opposite of "funny" depends on the context. Here are some possibilities:

If you're talking about humor:

* Serious

* Dull

* Boring

* Unfunny

* Grim

If you're talking about strange or unusual:

* Normal

* Ordinary

* Typical

* Expected

If you're talking about something being amusing or entertaining:

* Unentertaining

* Dull

* Monotonous

* Tedious

To get the most accurate opposite, you need to consider the specific situation where you want to use the word.