Here are some synonyms for "inane":
* Meaningless
* Foolish
* Vacuous
* Silly
* Frivolous
* Pointless
Examples:
* "The movie was filled with inane jokes that fell flat."
* "Her conversation was full of inane chatter about nothing."
* "He made an inane comment about the weather."
Essentially, "inane" describes something that is unintelligent, uninteresting, and lacks any real value or purpose.