unrhythmical (adj.)

• broken
• capricious
• catchy
• choppy
• desultory
• disconnected
• discontinuous
• eccentric
• erratic
• fitful
• flickering
• fluctuating
• halting
• inconstant
• intermittent
• irregular
• jerky
• nonuniform
• patchy
• rambling
• rough
• scrappy
• spasmodic
• spastic
• sporadic
• spotty
• staggering
• uncertain
• unequal
• uneven
• unmethodical
• unsettled
• unsteady
• unsystematic
• variable
• wandering
• wavering
• wobbling
• wobbly