verb (used with object), pervaded, pervading.
to become spread throughout all parts of: Spring pervaded the air.

1645–55; < Latin pervādere to pass through, equivalent to per- per- + vādere to go, walk

pervader, noun
pervadingly, adverb
pervadingness, noun
pervasion [per-vey-zhuhn] , noun
pervasive [per-vey-siv] , adjective
interpervade, verb (used with object), interpervaded, interpervading.
unpervaded, adjective
unpervading, adjective

diffuse, fill. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
pervade (pɜːˈveɪd)
(tr) to spread through or throughout, esp subtly or gradually; permeate
[C17: from Latin pervādere, from per- through + vādere to go]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

1650s, from L. pervadere "spread or go through," from per- "through" + vadere "to go" (see vamoose).
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Pervading this responsibility is a commitment to conserve a healthy environment.
So thick is the gloom pervading the rich world that the once-regular
  emerging-market crises have almost been forgotten.
Pervading these stories is an uneasiness about technological change.
Consider the often-noticed but often-misunderstood self-empowerment theme
  pervading the today's pop culture.
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