Synonyms for Iffy:

• adj.

  •chancy (adjective)
  • rocky,
  • hazardous,
  • unsound,
  • tricky,
  • ticklish,
  • touchy,
  • contingent,
  • Fluctuant.
  •changeable (adjective)
  • unpredictable.
  •debatable (adjective)
  • moot,
  • questionable.
  •dicey (adjective)
  • dangerous,
  • difficult.
  •doubtful (adjective)
  • insecure,
  • fishy,
  • unstable,
  • suspicious,
  • shady,
  • suspect.
  •dubious (adjective)
  • unreliable,
  • untrustworthy,
  • undependable.
  •erratic (adjective)
  • inconsistent,
  • arbitrary,
  • irregular,
  • volatile.
  •iffy (adjective)
  • unsettled,
  • capricious,
  • whimsical,
  • in lap of gods.
  •improbable (adjective)
  • weak.
  •incalculable (adjective)
  • unforeseen.

• Other synonyms:

  •
  • clouded,
  • dubitable.
  •
  • ambiguous.
  •
  • borderline,
  • equivocal.
  •Other relevant words:
  • explosive,
  • Teetering,
  • provisory,
  • awkward,
  • undetermined,
  • critical,
  • irrational,
  • controversial,
  • subjective,
  • delicate,
  • unsteady,
  • treacherous,
  • complex,
  • deniable,
  • Questioned,
  • fortuitous,
  • hairy,
  • risky,
  • flimsy,
  • fatal,
  • dependent,
  • sensitive,
  • disputed,
  • charged,
  • knotty,
  • doubted,
  • suppositional,
  • causeless,
  • varying,
  • chanceful,
  • Destinal,
  • fraught,
  • suspensive,
  • inflammable,
  • random,
  • Unreasoned,
  • adventitious,
  • ugly,
  • unlooked-for,
  • not certain,
  • vacillating,
  • refutable,
  • flash,
  • uncaused,
  • rickety,
  • conjectural,
  • accidental,
  • aleatory,
  • complicated,
  • anxious,
  • Mistakable,
  • thorny,
  • unproved,
  • fatidic,
  • Chancey,
  • tense,
  • tottering,
  • confutable,
  • untested,
  • at issue,
  • perilous,
  • casual,
  • sticky,
  • wobbly,
  • unforeseeable,
  • incidental,
  • wobbling,
  • in the balance,
  • nasty,
  • unexpected,
  • chance,
  • slippery,
  • odd.

Antonyms for Iffy:

• adj.

  • chancy
    secure, safe, tried, not dangerous.
  • conditional
    unconditional, unlimited, unrestricted, unqualified, independent.
  • debatable
    incontrovertible, inarguable, Uncontestable, Indubious, questionable, undoubted.
  • doubtful
    decided, exact, settled, resolved, clear, unquestionable, confirmed.
  • dubious
    positive, trustworthy, Undoubtful, trusty, doubtless.
  • erratic
    dependable, consistent, unchanging, steady, predictable, regular.
  • iffy
    definite, certain, reliable, sure.
  • improbable
    ostensible, plausible, probable, possible, believable, tenable, likely.
  • incalculable
    countable, calculable, limited, measurable.