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Meaning of difficult words:
  
S. No.
Words
Meaning
1.
ThresholdRefers to level or limit of something
2.
Exhausted Refers to tiredness or emptiness
3.
Consumable A commodity that needed to be replaced often
4.
DeprivedLacking something
5.
BarrierAn obstacle that prevents something
6.
GrappleRefers to a struggle or difficulty in working with something
7.
Frustrating Causing you to feel upset or disappointed
8.
WonderingExpressing a wish to know about something
9.
SillySomething which denotes lack of evaluative thought
10.
RelyTo depend on somebody or something
11.
Technologist Refers to an expert in a particular field 
12.
Independent Not taking help from anyone
13.
AccessApproaching or entering something
14.
Curriculum The courses taught by school or a college
15.
PeerSomeone at your equal level
16.
Advocate Someone who supports or suggests an idea
17.
NavigateTo find a direction
18.
BespokeThings designed as per customer's needs
19.
Environment Physical surrounding
20.
Impairment Disability
21.
Cloistered Separated from the outside world