1846, "deviation from an east-facing position;" 1882, "confusion as to direction;" see dis- + orientation. Perhaps its immediate origin in some cases is as a noun of action or state from disorientate (1704).
his disorientation was the result of inattention
disorder
disorderly
disorganization
disorganize
disorient
disorientation
disown
disownment
disparage
disparagement
disparate