A prudent
`aruwm (aw-room')
cunning (usually in a bad sense) -- crafty, prudent, subtil.
man
'adam (aw-dawm')
ruddy i.e. a human being (an individual or the species, mankind, etc.) -- another, + hypocrite, + common sort, low, man (mean, of low degree), person.
concealeth
kacah (kaw-saw')
to plump, i.e. fill up hollows; by implication, to cover (for clothing or secrecy) -- clad self, close, clothe, conceal, cover (self), (flee to) hide, overwhelm.
knowledge
da`ath (dah'-ath)
knowledge -- cunning, (ig-)norantly, know(-ledge), (un-)awares (wittingly).
but the heart
leb (labe)
the heart; also used (figuratively) very widely for the feelings, the will and even the intellect
of fools
kciyl (kes-eel')
fat, i.e. (figuratively) stupid or silly -- fool(-ish).
proclaimeth
qara' (kaw-raw')
to call out to (i.e. properly, address by name, but used in a wide variety of applications)
foolishness
'ivveleth (iv-veh'-leth)
silliness -- folly, foolishly(-ness).