(a.) Spasmodic; irregularly variable; unstable\.

adrift afloat aimless alternating amorphous broken broken off capricious careening casual catchy changeable changeful chopped-off choppy convulsive correctly decently decorously decousu desultory deviable deviative disarticulated disconnected discontinued discontinuous discrete disjunct disjunctive disordered dispersed disproportionate dizzy eccentric eclamptic episodic erratic fast and loose fickle fidgety fitly fittingly flickering flighty flitting fluctuating formless freakish frivolous giddy gratuitous guttering halting haphazard herky-jerky heteroclite hit-or-miss immethodical impetuous impulsive inchoate incoherent inconsistent inconstant indecisive indiscriminate infirm intermittent intermitting interrupted irregular irresolute irresponsible jagged jerking jerky jiggety jumpy justly lurching mazy meaningless mercurial misshapen moody nicely noncontinuous nonlinear nonsequential nonserial nonsymmetrical nonsystematic nonuniform occasional on-again-off-again orderless orgasmic parenthetic patchy periodic planless promiscuous properly rambling random recurrent restless rightly rough roving saltatory scatterbrained scrappy senseless shapeless shifting shifty shuffling snatchy spasmatic spasmic spasmodic spastic spineless sporadic spotty staggering straggling straggly suspended systemless twitchety twitching twitchy unaccountable unarranged uncertain unclassified unconnected uncontrolled undependable undirected undisciplined unequal uneven unfixed ungraded unjoined unmethodical unmetrical unordered unorganized unpredictable unregular unreliable unrestrained unrhythmical unsettled unsorted unstable unstable as water unstaid unsteadfast unsteady unsuccessive unsymmetrical unsystematic ununiform vacillating vagrant vague variable varying veering vellicative vicissitudinary vicissitudinous volatile wandering wanton wavering wavery wavy wayward whimsical wishy-washy wobbling wobbly