Part 1.
ramshackle
in deplorable condition
relinquish
turn away from; give up
respective
considered individually
appallingly
to an appalling extent
asphyxiated
in a state of asphyxia
detrimental
causing harm or injury
Part 2.
herbivorous
feeding only on plants
obliterated
reduced to nothingness
venturesome
disposed to take risks
bad-tempered
annoyed and irritable
congregation
the act of assembling
unattainable
impossible to achieve
Part 3.
quadrilateral
a four-sided polygon
superannuated
too old to be useful
reconnaissance
the act of scouting
vow
a solemn pledge to do something
wry
humorously sarcastic or mocking
acme
the highest point of something
Part 4.
apex
the highest point of something
clout
(boxing) a blow with the fist
decry
express strong disapproval of
embed
fix or set securely or deeply
onset
the beginning or early stages
quail
small gallinaceous game birds