The following definitions below are taken form the Cambridge Learner's Dictionary, 2nd Edition. Cambridge Univeristy Press
agitated adjective
very anxious or upset
He seemed agitated, as if something was worrying him.
replace verb [ T ]
1 USE INSTEAD to start using another thing or person instead of the one that you are using now
We're thinking of replacing our old TV with a fancy new one.
2 BE USED INSTEAD to start to be used instead of the thing or person that is being used now
This system will replace the old one.
3 GET SOMETHING NEW to get something new because the one you had before has been lost or damaged
We'll have to replace this carpet soon.
4 PUT BACK FORMAL to put something back in the place where it usually is
She picked up the books and carefully replaced them on the shelf.
challenge verb [ T ]
1 DISAGREE to express disagreement with ideas, rules, or someone's authority
The election results are being challenged.
2 INVITE to invite someone to compete in a game or fight
He challenged Smith to a fight.
courage noun [ U ]
1 the ability to deal with dangerous or difficult situations without being frightened
The soldiers fought with great courage.
[+ to do sth] She didn't have the courage to tell him the truth.
2 pluck up the courage (to do sth)
to decide to do something that you were too frightened to do before
Gerhard finally plucked up the courage to ask Nicole for a date.
convict verb [ T ]
to decide officially in a court of law that someone is guilty of a particular crime
[often passive] He was convicted of murder.
a convicted criminal
boycott noun [ C ]
when someone refuses to buy, use, or do something because they do not approve of it
Environmental groups have called for a boycott of the company's products.
boycott verb [ T ]
Several countries boycotted the international peace talks.
decision noun [ C ]
a choice that you make about something after thinking about several possibilities
She has had to make some very difficult decisions .
[+ to do sth] It was his decision to leave.
The committee should come to/reach a final decision by next week.
force verb [ T ]
1 PERSON to make someone do something that they do not want to do
[+ to do sth] The hijacker forced the pilot to fly to New York .
[often passive] She was forced out of the race by a knee injury.
2 OBJECT to make an object move or open by physical strength or effort
They had to force the lock.
She forced the window open.
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