We need different terms for these two concepts: “blocking” means parking a thread a.k.a. wasting it, and for this it does not matter whether it is bounded or not (we should qualify it as such where needed). Not making progress for indefinite amounts of time can still be desired, e.g. for an actor which tries to break a Rijndael cipher (which is indefinite for practical purposes). Unfortunately “blocking” is already taken, what are the alternatives? We need it in order to describe starvation scenarios, which can result in a deadlock. “hogging”? “squatting”? The word should have just the right amount of negative connotation to it ;-)