wildly optimistic

Translations
чрезвычайно оптимистичный
He was wildly optimistic about the outcome of the negotiations.
Он был чрезвычайно оптимистичен относительно исхода переговоров.
Definitions
Having an excessively positive or hopeful outlook on a situation, often without regard for realistic outcomes or potential challenges.
Words
wildly

adverb
чрезвычайно
optimistic

adjective
оптимистичный