1. (a.) Moving like a wave; wavering

2. (a.) showing undulation or fluctuation; as, a fluctuant tumor.

3. (a.) Floating on the waves.

adrift afloat agnostic aimless alternating ambiguous ambitendent ambivalent amorphous arbitrary at loose ends brittle broken careening careless casual catchy chancy changeable changeful changing choppy corruptible cranky crotchety deciduous desultory deviable deviating deviative deviatory dicey different disarticulated disconnected discontinuous disjunct disordered disorderly dispersed disproportionate divaricate divergent diversified diversiform dizzy double-minded doubting dubious dying eccentric effervescent ephemeral equivocal erose erratic evanescent fading fanciful fantasied fantastic fast and loose fence-sitting fence-straddling fickle fitful flaky fleeting flickering flighty flitting fluctuant fluctuating fly-by-night flying formless fragile frail freakish frivolous fugacious fugitive giddy gratuitous guttering halting haphazard harebrained heedless herky-jerky hesitant hesitating heteroclite hit-or-miss humorsome iffy immethodical impermanent impetuous impulsive inadvertent incalculable inchoate incoherent inconsiderate inconsistent inconstant indecisive indemonstrable indiscriminate infirm infirm of purpose insubstantial intermittent intermitting irregular irresolute irresolved irresponsible jagged jerky kinky lubricious lurching maggoty mazy meaningless mercurial misshapen momentary moody mortal motiveless motley mugwumpian mugwumpish mutable nonconformist nondurable nonpermanent nonstandard nonsymmetrical nonsystematic nonuniform notional of two minds orderless passing patchy perishable petulant planless pluralistic polysemous promiscuous quirky ragged rambling random reasonless restless rough roving scatterbrained scrappy senseless shapeless shifting shifty short-lived shuffling skeptical snatchy spasmatic spasmic spasmodic spastic spineless sporadic spotty staggering straggling straggly systemless temperamental temporal temporary thoughtless ticklish touch-and-go transient transitive transitory unaccountable unarranged uncalculating uncertain unclassified unconfirmable uncontrolled unconvinced undecided undependable undetermined undirected undisciplined undivinable undurable unenduring unequable unequal uneven unfixed unforeseeable ungraded unguarded unjoined unmethodical unmetrical unordered unorganized unorthodox unpersuaded unpredictable unprovable unreasonable unreasoning unreflecting unregular unreliable unresolved unrestrained unrhythmical unsettled unsorted unstable unstable as water unstaid unsteadfast unsteady unsure unsymmetrical unsystematic unthinking unthoughtful ununiform unverifiable vacillating vagarious vagrant vague variable variegated variform