on one side: it should be the correct spelling of entertaining
on the other hand: it is utterly wrong spelling of entertaining and isn't even useful(like lol) or fun to say or type for that matter
and last but not least it is a comment used when you are describing ur intrest in a perticler thing in a tv show you find entertainment
Bonus mening the enter tainment meets your interest
that laecture on stds was so "intertaing"
the technology used in doctor who is intertaining