Adolescence /ˌæd

With (the benefit/wisdom of) hindsight, I should have taken the job.
In hindsight, it would have been better to wait.
icon /ˈaɪ.kɒn/ /-kɑːn/ noun [ C ] COMPUTER SYMBOL
1. a small picture or symbol on a computer screen that you point to and click on (= press) with a mouse (= small control device) to give the computer an instruction
See picture computer
icon /ˈaɪ.kɒn/ /-kɑːn/ noun [ C ] FAME
2. a very famous person or thing considered as representing a set of beliefs or a way of life
Marilyn Monroe and James Dean are still icons for many young people.
identity /aɪˈden.tɪ.ti/ /- t ̬  ə.t ̬i/ noun [ C or U ]
who a person is, or the qualities of a person or group which make them different from others
The man's identity was being kept secret while he was helping police with enquiries.
I cannot reveal the identity of my source.
The informant was given a new identity (= a different name and new official documents) for protection.
The newspaper photo apparently showed him in Rome but it was a case of mistaken identity (= it was the wrong person) .
In prison people often suffer from a loss of identity.
I think my job gives me a sense of identity.
implication /ˌɪm.plɪˈkeɪ.ʃ ə n/ noun
1. [ C or U ] when you seem to suggest something without saying it directly
[ + that ] From what she said, the implication was that they were splitting up.
She accused the party and, by implication, its leader too.
2. [ C usually plural ] the effect that an action or decision will have on something else in the future
The company is cutting back its spending and I wonder what the implications will be for our department.
What are the implications of the new law?
3. [ U ] when you suggest or show that someone is involved in a crime
The case depended upon his implication of his co-workers in the fraud.
impact /ˈɪm.pækt/ noun [ C usually singular U ]
1. the force or action of one object hitting another
The impact of the crash reduced the car to a third of its original length.
The bullet explodes on impact (= when it hits another object) .
2. a powerful effect that something, especially something new, has on a situation or person
The anti-smoking campaign had had/made quite an impact on young people.
The new proposals were intended to soften the impact of the reformed tax system.