acute
anticipant
anticipatory
apperceptive
appercipient
argute
astute
clairvoyant
cogent
discerning
divinatory
farseeing
farsighted
forehanded
foreknowing
foreseeing
foresighted
forethoughtful
incisive
intuitive
longheaded
longsighted
penetrating
perceptive
percipient
perspicacious
perspicuous
piercing
precautional
precautionary
precautious
precognitive
precognizant
prepared
prescient
provident
providential
provisional
prudent
ready
sagacious
trenchant
understanding