The correct antonym for OBSCURE is Clear.
The word Obscure has several meanings, but generally refers to something that is not discovered or known about; uncertain, or not clearly expressed or easily understood. It can describe a concept that is vague or difficult to grasp, a place that is remote and little known, or a person who is not famous. The core idea is a lack of clarity, visibility, or comprehensibility, making something difficult to perceive or interpret. It implies a state of being hidden, indistinct, or perplexing.
Conversely, Clear describes something that is easy to perceive, understand, or interpret. It implies distinctness, transparency, and freedom from ambiguity or confusion. A clear explanation is easy to follow, a clear view is unobstructed, and a clear decision is unambiguous. This quality of being readily apparent and comprehensible stands in direct opposition to the vagueness and difficulty associated with 'obscure.' While 'Vague,' 'Hidden,' and 'Unknown' are all synonyms or closely related concepts to 'obscure,' 'Clear' is its most accurate and direct antonym, representing perfect understanding and visibility.