dishearten
bottle it
take the wind out of someone's sails
disincentivize
put off
rain on someone's parade
piss on someone's bonfire
reprove
deter
get in someone's hair
cut the ground from under someone's feet
disempower
can't be bothered
daunt
demotivate
simmer down
run on empty
mislike
tamp down
renounce
fight down
tergiversate
deny
apostatise
apostatize
pass over
keep it together
throttle down
hold one's nose
choke back
piss in someone's cornflakes
throw something in someone's face
dispirit
withdraw
gut up
tear away
detain
draw a veil over
nut up
outpsych
talk down
discourage
steal someone's thunder
borrow
protest too much
burst someone's bubble
cede the field
swipe left
disincline
unaccept