What is antonym for splendid?

Here are some antonyms for "splendid," depending on the context:

General Antonyms:

* Mediocre

* Ordinary

* Dull

* Lackluster

* Poor

* Terrible

* Awful

* Abysmal

Antonyms related to appearance:

* Ugly

* Unattractive

* Unsightly

* Shabby

* Dilapidated

Antonyms related to success or achievement:

* Failed

* Unsuccessful

* Miserable

* Disastrous

The best antonym will depend on the specific meaning of "splendid" in your context.