Bleariest is the superlative of bleary—having the most tired, unfocused, or watery eyes.
Someone at their bleariest has just woken up or stayed up far too long: At my bleariest, I can barely read the alarm clock.
The word extends to anything dimmed or blurred: the bleariest hours before dawn.
1. vision — blurry, Indistinct, lacking definition; unfocused (Without clear direction); fuzzy (Soft and unclear); hazy (Unclear, indistinct); squinting · dim · cloudy · misty · foggy · indistinct · obscured · watery · strained · swimming
2. fatigue — exhausted, Utterly depleted of energy; drowsy (Nearly falling asleep); sleepy (Wanting to doze); groggy (Weak and unsteady); weary · tired · spent · drained · fatigued · sluggish · lethargic · heavy-lidded · half-asleep · nodding