Cheer sb on
shout loudly to encourage sb
drop out of
quit being part of sth
go in for
take part in sth
let sb down
make sb disappointed
take on
accept sth (a challenge)
burn (sth) off
get rid of (fat or calories)
referee
teammate
opponent
referee
give up
stop trying sth
pick sth up
learn sth
put sb off
discourage sb
try sth out
do sth for the first time
