inconstant (adj.)
- adrift
- afloat
- alternating
- amorphous
- brittle
- broken
- capricious
- catchy
- changeable
- changeful
- changing
- choppy
- coquettish
- corruptible
- deciduous
- derelict
- desultory
- deviating
- different
- disaffected
- disconnected
- discontinuous
- disloyal
- disorderly
- divergent
- diversified
- dizzy
- dying
- eccentric
- elusive
- ephemeral
- erose
- erratic
- evanescent
- faddish
- fading
- faithless
- false
- fickle
- fitful
- fleeting
- flickering
- flighty
- flirtatious
- fluctuating
- fly-by-night
- flying
- fragile
- frail
- freakish
- fugacious
- fugitive
- giddy
- halting
- impermanent
- impetuous
- impulsive
- inattentive
- inconsistent
- indecisive
- indefinite
- infirm
- insubstantial
- intermittent
- irregular
- irresolute
- irresponsible
- jagged
- jerky
- light
- lubricious
- mazy
- mercurial
- momentary
- moody
- mortal
- motley
- mutable
- negligent
- noncompliant
- nonconforming
- nonconformist
- nonobservant
- nonstandard
- nonuniform
- passing
- patchy
- perishable
- pluralistic
- protean
- quicksilver
- ragged
- rambling
- recreant
- restless
- rough
- roving
- scatterbrained
- scrappy
- shapeless
- shifting
- shifty
- short-lived
- skittish
- spasmodic
- spastic
- spineless
- sporadic
- spotty
- staggering
- temperamental
- temporal
- temporary
- ticklish
- transient
- transitive
- transitory
- unaccountable
- uncertain
- uncontrolled
- undependable
- undisciplined
- unequal
- uneven
- unfaithful
- unfixed
- unmethodical
- unobservant
- unorthodox
- unpredictable
- unreliable
- unrestrained
- unrhythmical
- unsettled
- unstable
- unsteady
- unsystematic
- untrue
- vacillating
- vagrant
- vague
- variable
- variegated
- variform
- various
- varying
- versatile
- volatile
- wandering
- wanton
- wavering
- wavy
- wayward
- whimsical
- wishy-washy
- wobbling
- wobbly
Rom. Lady, by yonder blessed moon I swear,
That tips with silver all these fruit-tree tops—
Jul. O, swear not by the moon, the inconstant moon,
That monthly changes in her circled orb,
Lest that thy love prove likewise variable.
