Difference between Optimistic and Bleak

OPTIMISTIC vs BLEAK: NOUN

Any of various small European freshwater fishes of the genus Alburnus, having silvery scales.
An English name of a small cyprinoid fish, Alburnus lucidus. Other forms of the name are bleik, blick. Also called blay.
A small European river fish (Leuciscus alburnus), of the family Cyprinidæ; the blay.
A small European river fish (Alburnus alburnus), of the family Cyprinidae.

Expecting the best in all possible ways.
Hopeful; sanguine.
Of or pertaining to optimism; tending, or conforming, to the opinion that all events are ordered for the best.
Expecting the best in this best of all possible worlds
Expecting the best

Of, pertaining to, or characterized by optimism; disposed to take the most hopeful view of a matter; hopeful; sanguine.

Satisfied, Convinced, Confident, Hopeful, Pessimistic, Starry eyed, Rose colored, Affirmative, Cheerful, Pollyannaish, Positive, Rosy, Bullish, Upbeat, Sanguine

Dire, Glum, Grim, Gloomy, Cutting, Black, Raw, Cold, Bare, Inhospitable, Barren, Desolate, Hopeless, Dim, Stark

Satisfied, Convinced, Confident, Hopeful, Pessimistic, Starry eyed, Rose colored, Affirmative, Cheerful, Pollyannaish, Positive, Rosy, Bullish, Upbeat, Sanguine

Dire, Glum, Grim, Gloomy, Cutting, Black, Raw, Cold, Bare, Inhospitable, Barren, Desolate, Hopeless, Dim, Stark

Pandemic experts are starting to sound increasingly optimistic.
Correcting for optimistic prediction in small data sets.
Still, ultimately he is guardedly optimistic about mechanism.
Studies conducted in humans show less optimistic findings.
This is an optimistic skyline of New York.
These results are related to the hypothesis of optimistic bias, which states that drinkers are overly optimistic about probabilities of adverse consequences from drink.
In an optimistic locking session, you must take responsibility for coherence and consistence by following an optimistic locking protocol.
SD, through the slightly optimistic last observation carried forward method, to the optimistic complete case analysis.
Are you more optimistic or less optimistic than you were a month ago?
That was idealistic and optimistic, a way too optimistic hope.

James Hawkins of accessible from the bleak North.
The situation is pretty bleak on this front.
In this bleak scene the steadfastness of Col.
The future of ASU is looking more bleak.
Things are looking pretty bleak for Michigan State.
He offered a bleak assessment of the industry.
The chances of a peaceful settlement seem bleak.
The weather was perfect - bleak and cold.
Bleak, bleak the east wind sobs and sighs, And drowns the turret bell, Whose sad note, undistinguished, dies Unheard, like my farewell!
The debt outlook is certainly bleak, but it is slightly less bleak than it seemed a few months ago.