unmeditated (adjective) automatic: done by habit
Sinonime: autogenetic,
habitual,
impulsive,
instinctive, instinctual,
intuitive, involuntary, knee-jerk,
mechanical,
natural,
perfunctory, reflex,
routine,
spontaneous,
unconscious, unforced,
unintentional, unmeditated, unthinking, unwilled
Antonime: thought-out