Adolescence /ˌæd

decline /dɪˈklaɪn/ verb GO DOWN
1. [ I ] to gradually become less, worse, or lower
His interest in the project declined after his wife died.
The party's popularity has declined in the opinion polls.
formal The land declines sharply away from the house.
decline /dɪˈklaɪn/ verb REFUSE
2. [ I or T ] formal to refuse
I invited him to the meeting but he declined.
He declined my offer.
[ + to infinitive ] They declined to tell me how they had got my address.
diminish /dɪˈmɪn.ɪʃ/ verb [ I or T ]
to reduce or be reduced in size or importance
I don't want to diminish her achievements, but she did have a lot of help.
These memories will not be diminished by time.
What he did has seriously diminished him in many people's eyes.
We've seen our house diminish greatly/sharply/substantially in value over the last six months.
dominate /ˈdɒm.ɪ.neɪt/ /ˈdɑː.mə-/ verb [ I or T ] often disapproving
to have control over a place or a person, or to be the most important person or thing
He refuses to let others speak and dominates every meeting.
They work as a group - no one person is allowed to dominate.
dwindle /ˈdwɪn.dl ̩/ verb [ I ]
to become smaller in size or amount, or fewer in number
The community has dwindled to a tenth of its former size in the last two years.
Her hopes of success in the race dwindled last night as the weather became worse.