obscure,dark,vague,enigmatic,cryptic,ambiguous,equivocal mean not clearly understandable.
obscure implies a hiding or veiling of meaning through some inadequacy of expression or withholding of full knowledge.
dark implies an imperfect or clouded revelation often with ominous or sinister suggestion.
vague implies a lack of clear formulation due to inadequate conception or consideration.
enigmatic stresses a puzzling, mystifying quality.
cryptic implies a purposely concealed meaning.
ambiguous applies to language capable of more than one interpretation.
equivocal applies to language left open to differing interpretations with the intention of deceiving or evading.
Adjective, Noun, and Verb
Middle Englishderk, from Old Englishdeorc; akin to Old High Germantarchannen to hide
Adjective
before the 12th century, in the meaning defined atsense 1a
Noun
14th century, in the meaning defined atsense 1a
Verb
14th century, in the meaning defined attransitive sense
“Dark.”Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dark. Accessed 12 Apr. 2025.
dark
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Merriam-Webster unabridged