Theory:

Meaning of difficult words from the lesson "Bepin Choudhury's Lapse of Memory":
 
S.No
Words
Meaning
1.
IntrovertA quiet, reserved person
2.
MeekSomeone quiet, gentle and doing what others say without asking questions
3.
SupposeTo think that something is true or probable
4.
Idle chatUnnecessary talk
5.
AcquaintanceSomeone you know a little, who is not a close friend
6.
StrangerSomeone you do not know
7.
Familiar Someone or something well known to you; Often seen or heard before 
8.
DisagreeTo not to agree
9.
RevealTo make something known to someone that was unknown before
10.
Bawarchi(Hindi)Chef
11.
WoundAn injury occurred in the body part
12.
IntruderSomeone who enters a place or situation where they are not wanted 
13.
Inconceivable Impossible to think or imagine
14.
ReelTo feel shocked or upset about something
15.
ContradictoryBeing opposite to or not matching something
16.
InsanitySevere medical illness
17.
Miscommunication A failure to communicate clearly
18.
Absolutely Completely
19.
Falsehood A statement that is not true
20.
ConfirmationA statement saying that something is true or accurate
21.
Going nutsGoing mad
22.
Indeed In reality
23.
RuthlessMaking other people suffer without showing pity on them
24.
Snuggling  To move yourself into a warm, comfortable position
25.
Sarcasm Use of words to mock someone
26.
AnnoyanceSomething that makes you angry
27.
Embarrassing Something that makes you feel ashamed or nervous
28.
Thick-skinned
Someone who is not offended by criticisms or satirical remarks
29.
BotherTo annoy or worry somebody
30.
Awkward Something difficult to deal with
31.
Sleuthing An act of investigating an event
32.
GripTo hold something tightly
33.
WhirlA state of confusion
34.
TirelessWorking hard for long without stopping
35.
Conscientious Working hard and careful to perform things well
36.
Instance A particular case, example, situation or an event
37.
WitAbility to think quickly and clearly
38.
Appearing like a bad pennyTo appear again in a place where you are not wanted
39.
Beat about the bushTo talk about something for a long time without getting into the main point
40.
SighTo breathe out slowly with a long sound when you are disappointed or tired
41.
Incredulous Something impossible to believe
42.
StareTo look at somebody or something for a long time
43.
RemarkTo say or write something
44.
Thoughtful Thinking seriously about something 
45.
DesperateThe state of losing hope
46.
Physician A doctor
47.
AnxiousWorried that something bad will happen
48.
Tranquilliser/ SedativeA drug that makes you sleep given to someone when they are nervous or anxious
49.
ProcureTo obtain something without difficulty
50.
AsylumA mental hospital
51.
BoulderA very large rock
52.
ClampTo hold something tightly in a particular position
53.
ConfidentialSecret that should not be told or shared with other people