Inaudible
too quiet to be heard
Implausible
not believable, highly unlikely (dubious)
Subdued
quiet, calm
Audacity
boldness, often in the face of authority (brazenness, impudence)
Proliferate
to grow in number
Satiate
to satisfy a desire, often for nourishment
Placate
to soothe or settle (appease, mollify)
Steadfast
not subject to change (resolute)
Inconspicuous
hard to see, not noticeable
Eschew
to avoid habitually (shun)
Innocuous
harmless (benign)
Bellicose
warlike, aggressively violent (belligerent)
Unanimity
agreement from all, complete unity (accord)
Fallacy
a false idea or agreement , a lie
Brevity
briefness (terseness)
Immutable
unchanging, stable (permanent)
Nugatory
of no importance (trivial)
Frivolous
unimportant or lacking seriousness (silly, trivial)
Superfluous
unnecessary or extravagant (extraneous, needless)
Extraneous
not belonging (alien, external)
not an important part, not essential (superfluous, irrelevant)