'old' in a polite way
elderly
wisdom that comes with age
maturity
an important event in one's life
a milestone
feel both positive and negative about something
have mixed feelings about something
optimistic
upbeat
in the best period of one's life
in one's prime
childish
immature
average quality
mediocrity
think about a future event and feel positive about it
look forward to something
see things in a positive way
look on the bright side
behave in a more adult way
act your age
to write
to pen
unfair, prejudiced
biased
sometimes go well and sometimes go badly
have one's ups and downs
long life
longevity
treating people unfairly based on age
age discrimination
a company or business
enterprise
people who are the same age
peers
be really worried and fearful about something
dread something
accidentally find an answer to something
stumble across something
reach the age when legally an adult
come of age
constantly changing
ever-shifting
make no progress
go nowhere
make someone feel extremely negative
fill someone with despair
travel on your own
travel solo