undirected (adj.)
- aberrant
- aimless
- amorphous
- capricious
- casual
- causeless
- circuitous
- desultory
- deviant
- deviating
- devious
- digressive
- discontinuous
- discursive
- disjunct
- disordered
- dispersed
- disproportionate
- errant
- erratic
- excursive
- fitful
- formless
- frivolous
- gratuitous
- haphazard
- hit-or-miss
- inchoate
- incoherent
- indirect
- indiscriminate
- inexplicable
- irregular
- labyrinthine
- mazy
- meandering
- meaningless
- mindless
- misshapen
- nonuniform
- out-of-the-way
- planetary
- planless
- promiscuous
- purposeless
- rambling
- random
- roving
- senseless
- serpentine
- shapeless
- shifting
- snaky
- spasmodic
- sporadic
- stochastic
- straggling
- straggly
- stray
- swerving
- turning
- twisting
- unaccountable
- unclassified
- ungraded
- unmethodical
- unmotivated
- unordered
- unorganized
- unsorted
- unsymmetrical
- unsystematic
- vagrant
- vague
- wandering
- winding
- zigzag