GMAT Vocabulary Flash Cards @ englishpdf.com and englishteststore.com File 184 diffidence (n) Self-distrust diffident (adj) Affected or possessed with selfdistrust diffuse (adj) spread out; verbose (wordy) diffusible (adj) Spreading rapidly through the system and acting quickly diffusion (n) Dispersion dignitary (n) One who holds high rank digraph (n) A union of two characters representing a single sound digress (v) To turn aside from the main subject and for a time dwell on some incidental matter