Adolescence /ˌæd

at your own risk
used to mean that you are responsible for any damage, loss or difficulty
Owners are reminded that they leave their cars here at their own risk.
run/take a risk
to do something you know might be dangerous
Don't take any risks - just ring the police.
beneficial /ˌben.ɪˈfɪʃ. ə l/ adjective
helpful, useful or good
The improvement in sales figures had a beneficial effect /influence on the company as a whole.
A stay in the country will be beneficial to his health.
chronic /ˈkrɒn.ɪk/ /ˈkrɑː.nɪk/ adjective LONG LASTING
1. (especially of a disease or something bad) continuing for a long time
chronic diseases/conditions chronic arthritis/pain a chronic invalid
There is a chronic shortage of teachers.
conceivable /kənˈsiː.və.bl ̩/ adjective
possible to imagine or to believe
Books on every conceivable subject lined one wall.
It's just conceivable (= possible although difficult to imagine) (that) the hospital made a mistake.
contaminate /kənˈtæm.ɪ.neɪt/ verb [ T ]
to make something less pure or make it poisonous
Much of the coast has been contaminated by nuclear waste.
The food which had been contaminated was destroyed.
contaminated /kənˈtæm.ɪ.neɪ.tɪd/ /-t ̬ɪd/ adjective
The infection was probably caused by swimming in contaminated water/water contaminated with sewage.