buttoned-up
reticent
untalkative
Spartan
abbreviated
abridged
aposiopestic
brief
brooding
brusque
clipped
close
close-lipped
close-tongued
closemouthed
compact
compendious
compressed
concise
condensed
contracted
crisp
curt
cut
docked
dour
dumb
economical of words
elliptic
epigrammatic
gnomic
indisposed to talk
laconic
mum
mute
pithy
pointed
pruned
quiet
reserved
sententious
short
short and sweet
shortened
silent
snug
sparing of words
speechless
succinct
crusty
elderly
fine-looking
impassive
irate
kindly
moon-faced
saturnine
stalwart
surly
tight-lipped
uncommunicative
unsociable
unsuspecting