take something to the grave
that'll be the day
keep shtum
one's lips are sealed
never-would-be
relentless
keep
unrelenting
persistent
permakill
confidable
sweep under the rug
immortality
spare
keep from
nonfatal
epstein
unimpugnably
keep one's lips sealed
under no circumstance
dump job
ghost
button one's lip
a rolling stone gathers no moss
fadelessness
murder will out
unsilenceably
keep one's counsel
abjuration of the realm
closet
batwing
undying
Nevuary
untombed
darkly
kill someone dead
deathless
abator
skulk
much less
nonsuicide
nonfatally
hush up
undeadly
live a lie
slayer rule
feet first
unalive
never-was
nonsecretor
go gentle into that good night
let nature take its course
self-killer
undetachably
nonkilling
devive
keep to oneself
unreddened
abscond
nonsecretion
life is short
burke
mum's the word
go the way of all flesh
give someone a bloody nose
prideless
asecretion
unconcealably
inseverably
flesh
betray
deathlike
extinguishment
dissemble
do a Reggie Perrin
unknelled
outsilence
unmortised
unbeheaded
martyrless
reproachless
unlaid
silence
involuntary manslaughter
box and lock
keep quiet
catch the bus
slip away
deadly
unmartyred
nevah
never ever
double kill
not while pussy's a cat
when two Sundays come together
when two Sundays meet
deadliness
lifelessly
maiden