blankminded (?.)

• awkward
• blank
• callow
• calm
• dumb
• empty
• empty-headed
• fatuous
• gauche
• green
• groping
• ignorant
• inane
• incogitant
• inexperienced
• innocent
• know-nothing
• naive
• nescient
• nirvanic
• oblivious
• passive
• quietistic
• raw
• relaxed
• simple
• strange to
• tentative
• thoughtfree
• thoughtless
• tranquil
• unacquainted
• unapprized
• uncomprehending
• unconversant
• unenlightened
• unfamiliar
• unideaed
• unilluminated
• uninformed
• uninitiated
• unintellectual
• unintelligent
• unknowing
• unoccupied
• unposted
• unreasoning
• unripe
• unsure
• unthinking
• unversed
• vacant
• vacuous