Adolescence /ˌæd

strain /streɪn/ noun PRESSURE
1. [ C usually singular or U ] a force or influence that stretches, pulls or puts pressure on something, sometimes causing damage
The hurricane put such a strain on the bridge that it collapsed.
As you get older, excess weight puts a lot of strain on the heart.
Their constant arguments were putting a strain on their marriage.
The recent decline in the dollar has put a bigger strain on the economic system.
Migration into the cities is putting a strain on already stretched resources.
2. [ C ] an injury to a muscle or similar soft part of the body caused by using that part too much
a groin/hamstring strain See also eyestrain
3. [ C or U ] when you feel nervous and worried about something
She's a lot better than she was but she's still not ready to face the stresses and strains of a job.
He's been under a lot of strain recently.
threat /θret/ noun [ C ]
1. a suggestion that something unpleasant or violent will happen, especially if a particular action or order is not followed
[ + to infinitive ] She carried out her threat to throw away any clothes that were left on the floor.
The threat of jail failed to deter him from petty crime.
Drunken drivers pose a serious threat (= cause a lot of harm) to other road users.
He says he'll tell the authorities but it's just an empty threat (= it will not happen) .
2. be under threat of sth
to be in a situation where people are threatening you with something bad or unpleasant
She left the country under threat of arrest if she returned.