acrimonious
sarcastic, caustic
mendacious
lying, false
noxious
physically or morally harmful
parsimonious
penurious, stingy
posthumous
post-mortem, post-obit
propitious
favorably inclined
pusillanimous
cowardly, craven
querulous
full of complaints
salubrious
promoting health
sedulous
diligent, busy
surreptitious
secret, covert
unctuous
oily, greasy