behave like an adult
grow up
increase the volume
turn up
drive faster
speed up
decorate the house
do up
formally establish (e.g. a company)
set up
raise your voice so as to be heard
speak up
become more relaxed, less serious
lighten up
start living in a place where you intend to stay for a long time or become calmer
settle down
make something seem less serious than it is
play sth down
to land (about a plane)
touch down
find something after looking for it in different places
track down
do or use less of something
cut down (on)
