Theory:

Meanings of difficult words from the poem "A Thing of Beauty":
  
No.
Words
Meanings
1
nothingness
the absence or cessation of life or existence
2
bowera pleasant shady place under trees
3
morrowthe following day
4
wreathingform a circular band of flowers
5
spite
1. poetic form of "in spite".
2. a desire to hurt someone.
6
despondencein low spirits from loss of hope or courage
7
inhumanlacking human qualities of compassion and mercy
8
deartha scarcity or lack of something
9
gloomydark or poorly lit
10
pall
1. a cloth spread over a coffin.
2. a dark cloud of smoke, dust.
11
sproutinggrow out shoots
12
daffodilsa yellow, bell-shaped spring flower with a long stem
13
rillssmall streams
14
covertnot openly acknowledged or displayed
15
musk-rose(of the Mediterranean region) white flowers having a musky odor
16
grandeursplendour and impressiveness
17
doomsdestruction, death or any unavoidable situation
18
immortalliving forever
19
brinkthe extreme edge of land before a steep slope or a body or water