foggiest

Least clear, mentally

Foggiest is the superlative of foggy, but it appears almost exclusively in the negative expression I haven't the foggiest, meaning I have no idea whatsoever.

The full form I haven't the foggiest idea is less common than the clipped version.

Outside this idiom, foggiest rarely appears.

obscured

veiled

Concealed or obscured

blurred · dimmed · shadowy · faint · imperceptible · hard to see · barely visible · out of focus · ill-defined · formless

clueless

ignorant

Lacking knowledge or awareness

unknowing · clueless · bewildered · baffled · mystified · perplexed · confused · puzzled · blank · stumped

weather

misty

Obscured by vapor

clouded · shrouded · visibility · damp · drizzle · condensation · vapor · smog · brume · grey

uncertain

doubtful

Uncertain of truth

  • unsureLacking confidence or certainty
  • unclearNot easily understood
  • vagueUnclear, ill-defined

hazy · indefinite · ambiguous · tentative · hesitant · wavering · undecided · iffy · dubious · sketchy

Opposites
mental clarity/understanding

foggiestclearest

Most transparent or obvious

sharpest · surest · crystal-clear · sunniest · certain

knowledge/understanding

foggiestclearest

Most transparent or obvious

best · slightest · certainty · informed · clued-in

Phrases
Family

foggier

Familiarity
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Profile
Known to kids · Used worldwide · Timeless · Everyday, not technical · Rated G