Theory:

Meanings of difficult words from the lesson "Macavity: The Mystery Cat":
 
S.No
Words
Meanings
1
Paw An animal's foot having claws and pads
2
Criminal A person who has committed a crime
3
Master criminal A clever criminal who is hard to be caught
4
DefyOpenly resist or refuse to obey
5
Bafflement The condition of being completely unable to understand or explain something
6
Scotland YardThe detective department of the London metropolitan police
7
Flying SquadA division of a police force or other organization which is capable of reaching a scene of crime or incident quickly
8
DespairThe complete loss or absence of hope
9
GravityThe force which causes things to drop to the ground
10
LevitationThe action of rising or causing something to rise and float in the air
11
FakirA Muslim or Hindu wanderer, often one reputed to perform magic, miracles, and wonders
12
Basement
The floor of a building which is partly or entirely below ground level
13
Sunken (Of eyes or cheeks) Having curved or moved inwards
14
DomedShaped like a rounded arch
15
SwayTo move slowly or rhythmically backwards and forwards or from side to side
16
WhiskersLong projecting hair or bristles growing from the face or snout of many mammals
17
Fiend A person (or animal) of great wickedness or maliciousness; a terrible person who can be likened to a demon
18
Feline Of relating to cats or the cat family
19
DepravityThe state of being morally bad, or an action that is morally bad
20
SquareAn open, typically four-sided, area surrounded by buildings in a village, town, or city
21
Monster Someone who is very cruel and evil;  (in stories) an imaginary creature that is very large, ugly and frightening
22
By-streetA street that is lead away from the main street; a private street or road
23
HideoutA safe place for hiding, especially from the law