murky/uncharted waters
a situation that is not well known and may be dangerous:
In the last two chapters of the book, she enters the murky waters of male sexuality.
After the Wall Street crash, the American economy moved into uncharted waters.
Thesaurus: synonyms and related words
Unknown and unfamiliar
- a pig in a poke idiom
- alien
- foreign
- hidden
- lesser-known
- obscure
- pig
- shadowy
- strange
- strangeness
- TBD
- terra incognita
- uncommon
- unexplored
- unfamiliar
- unheard-of
- unknown
- unused
- vocabulary
- wild card
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