Theory:

Meanings of difficult words from the lesson "The Accidental Tourist":
 
S.No
Words
Meanings
1
OutstandingThat which is clearly noticeable
2
LavatoryA toilet
3
AlleyA narrow passageway
4
SelflockingThat which locks automatically
5
En familleWith one's family
6
JammedUnable to move or work
7
YankedPull with a jerk
8
GruntsTo make a low inarticulate sound, typically to express effort
9
ConsternationA feeling of anxiety or dismay, typically at something unexpected
10
BudgeMake or cause to make the slightest movement
11
AbruptlySuddenly and unexpectedly
12
Ounce
A unit of weight, approximately 28 grams
13
ExtravagantlyIn an excessive or elaborate way
14
EjectedForce or throw something out in a violent or sudden way
15
DumbstruckSo shocked or surprised as to be unable to speak
16
SortedOrganized, arranged, or dealt with satisfactorily
17
FlutteryMove with a light irregular or trembling motion
18
CascadePour downwards rapidly and in large quantities
19
OblivionsState of being unseen or unaware
20
ConcourseA large open area inside or in front of a public building
21
Disgorging Pour something out
22
Air milesLoyalty points that could be redeemed for free flights 
23
BudgetIn the UK, the official statement that the government makes about how much it will collect in taxes and spend on public services in the future
24
GashedMake a long, deep cut in
25
HystericsA wildly emotional and exaggerated reaction
26
ExasperationA feeling of intense irritation or annoyance
27
CatastrophesAn event causing great and usually sudden damage or suffering; a disaster
28
ReclineLean or lie back in a relaxed position with the back supported
29
VenerableAccorded a great deal of respect, especially because of age, wisdom, or character
30
ClawingTo scratch or tear something with the claws or the fingernails
31
PerchA bar or makeshift table
32
StupefiedMake someone unable to think or feel properly
33
ZillionAn extremely large number
34
DrenchedWet thoroughly
35
OathHere an offensive word or phrase
36
Bons motsA witty remark
37
Scrub-resistantA stain that is tough and hard to remove
38
SuaveCharming, confident, and elegant, typically used of a man
39
SeismicRelating to earthquakes or other vibrations of the earth and its crust
40
HoodsA covering for the head and neck with an opening for the face, typically forming part of a coat or cloak
41
Entitled To give someone the right to do or have something