If you're having trouble reading that word, I'll admit that I do too. It's pronounced 'LIH-vih-TIH-nem'. But when my eyes glide over it, I just keep wanting to say 'living items', which must be the point, 'cause that's what they are!
Livitinems are benign critters in the world of DOFUS that live in your clothing items, whose only purpose in life is to change the appearance of your wardrobe. They don't confer bonuses or extra protection, they just sit there on top of you and occasionally comment on your adventures. An interesting thing about Livitinems is that they eat items; capes eat capes, amulets eat amulets, etc. When they've been fed enough, they evolve into a new appearance; Ankama says they can evolve up to 20 unique appearances.
How do you get a Livitinem? Either by subscribing to DOFUS, buying them, or exchanging them with other owners. There are those who may think the idea of a living hat that eats other hats is a little creepy, but just think of it like it's the Minish Cap -- cute! Wait ... they might be trying to say 'live it in 'em' instead. I'll find out and let you know!