im·per·mis·si·ble 
(ĭm′pər-mĭsə-bəl)
(ĭm′pər-mĭsə-bəl)adj.
Not permitted; not permissible: impermissible behavior.
im′per·mis′si·bili·ty n.
im′per·missi·bly adv.
- off (one's) rocker
- off one's rocker
- off/out of (one's) gourd
- off/out of (one's) head
- off/out of plumb
- off-peak
- off-piste
- off-price
- offprint
- off-putting
- off-road
- offroad
- off rocker
- offscouring
- offscreen
- off-season
- offset
- offset printing
- offshoot
- offshore
- offside
- offsides
- offsite
- off (someone's) back
- off someone's back