diffusive

That is spread or dispersed across a wide area or among a large number of people.

Involving or employing many words; expansive, discursive; (in negative sense) long-winded.

I can never forget the delight with which that diffusive and ingenious orator was heard by all sides of the House, and even by those whose existence he proscribed.

That diffuses something; disseminating.

Pertaining to diffusion.