diffuse

Short definition from Wiktionary

Verb

1. 1
   To spread (something) over or through as in air, water, or other matter, especially by fluid motion or passive means.
2. 2
   To be spread over or through as in air, water, or other matter, especially by fluid motion or passive means.

Adjective

1. 1
   Everywhere or throughout everything; not focused or concentrated.
2. 2
   Wordy; verbose.