lucidní

Lucidní is an adjective in Czech meaning clear-minded, lucid, or easily understood. It can describe mental state, discourse, or a perception that is free from confusion. In everyday use it often refers to someone who is awake, coherent, and aware of their surroundings, especially in contrast to periods of confusion or impairment. The term is also used in the context of dream research to describe lucid dreaming, where the dreamer is aware that they are dreaming and may control aspects of the dream. Additionally, in medical language the phrase lucidní interval appears, describing a temporary return of clear consciousness after a traumatic episode, before deterioration resumes.

Lexical notes and related forms: the noun form is lucidnost, referring to mental clarity or coherence of thought. The related noun lucidita is less common but also found in Czech, conveying the same idea of lucidity. The adverbial form is lucidně, used to indicate that something is done in a lucid manner, i.e., clearly or coherently. Synonyms include jasný, srozumitelný, čirý, a antonyms include naopak nejasný, zmatený.

Etymology and usage: lucidní derives from Latin lucidus “clear, bright.” The Czech word entered the language via historical Latin influence on medical, philosophical, and literary vocabulary, and it remains active in modern Czech across multiple domains—linguistics, psychology, medicine, and dream studies. In contemporary usage, lucidní often carries a positive connotation of clarity and rationality, though it can be context-specific, such as describing a patient’s moment of clarity or the clarity of an argument.

See also: lucid dreaming, lucidity, lucid interval.