(a.) Insignificant.

amorphous by the way capricious casual causeless chance designless desultory deviative digressive disarticulated discontinuous discursive disjunct disordered dispersed disproportionate driftless dysteleological empty episodic erratic excursive feckless fitful formless frivolous garbled gratuitous haphazard hit-or-miss immethodical importless impotent inane inchoate incoherent indiscriminate ineffective ineffectual inexplicable insignificant irregular loose maundering meaningless mindless misshapen no go nonconnotative nondenotative nonsymmetrical nonsystematic nonuniform null of no use orderless phatic planless pointless promiscuous purportless purposeless rambling random roving scrambled senseless shapeless spasmodic sporadic stochastic straggling straggly stray superfluous systemless unaccountable unarranged unavailing unclassified undirected ungraded unjoined unmeaning unmethodical unmotivated unordered unorganized unsignificant unsorted unsymmetrical unsystematic ununiform useless vagrant vague wandering wanton wayward