intervene
interpose
step in
interfere
interject
embroil
get in on the act
burn that bridge when one comes to it
mediary
involve
stage right
take the wheel
roll
intercome
play into someone's hands
motivate
stave off
stimulate
be
step up to the plate
antipositional
move
seductive
turn to
have the cards in one's hands
know what one is about
amenable
make
counteract
make hay while the sun shines
endangerment
go in for
have a hand in
propel
have a finger in
unlock
face the music
get what's coming to one
tighten up
be active
meddle
not know which way to turn
intervention
incline
preventive
see one's way clear to
partake
bind over
-ent
thwarten
dispose
turn one's hand to
sow dragon's teeth
shuffle
draw into
drop the gloves
set about
gateway
treat
expose
provide
know which side one's bread is buttered on
counter
gateway drug
anticipate
choose
see to
pick a lane
toe-dance
cross the Rubicon
pull the trigger
Nance
proactive
pay the fiddler
seal someone's fate
govern
oppose
end run
interventive
bent
arise
arm
deal with
preventionism
draw in
avoid
clear the decks
put a gun to someone's head
detain
interference
watch the feathers fly
take
forbear