random

adjectives

lacking any definite plan or order or purpose; governed by or depending on chance
"a random choice"; "bombs fell at random"; "random movements"
is derived from
antonym
is similar to
positive recurrent aperiodic state of stochastic systems; tending in probability to a limiting form that is independent of the initial conditions
is similar to
dependent upon or characterized by chance
"a haphazard plan of action"; "his judgment is rather hit-or-miss"
is similar to
being or having a random variable
"a stochastic variable"; "stochastic processes"