Tedious, lackadaisical (be aware that this one means that you are lacking interest)
uninteresting, arid, colorless, drab, dreary, flat, heavy, jading, jejune (this one is a big closer to immature) monochromatic, numbing, old, ponderous, wearisome, uninteresting, tiring.
hope i helped! :)
a or an
you can use or , otherwise, or rather than.
Like
next
spectacular
peter
Forefather?
athletics
hard
demonstrate, employ, illuminate,
You can use: manage and succeed.
pretty,sweet....