Part 1.
unbelievable
beyond understanding
unpretentious
lacking affectation
din
a loud harsh or strident noise
awry
turned or twisted to one side
base
lowest support of a structure
glib
artfully persuasive in speech
Part 2.
hoax
something intended to deceive
scan
examine minutely or intensely
veto
a vote that blocks a decision
zeal
a feeling of strong eagerness
deter
turn away from by persuasion
genre
an expressive style of music
Part 3.
jaunt
a journey taken for pleasure
lithe
moving and bending with ease
nadir
the lowest point of anything
quell
suppress or crush completely
queue
form a line or stand in line
sheer
so thin as to transmit light
Part 4.
tread
a step in walking or running
ad lib
without advance preparation
berate
censure severely or angrily
fiscal
involving financial matters
hybrid
a composite of mixed origin
infamy
a state of extreme dishonor