Translation guide
The partially shaded outer region of a shadow, especially during an eclipse, or a surrounding area of uncertainty.
The outer part of a shadow during an eclipse where the light source is only partially blocked.
During a lunar eclipse, the moon dims slightly when it enters the Earth's penumbra.
Refers specifically to a penumbral eclipse, where the moon passes through the penumbra without entering the umbra.
Tonight, a penumbral lunar eclipse can be seen.
A gray area, fringe, or surrounding region of ambiguity, doubt, or partial belonging.
Commonly used for a gray area or ambiguous zone, similar to the figurative penumbra. Natural in everyday and legal contexts.
That issue lies in the penumbra of the law.
Means 'border region' or 'boundary area', suitable for describing a penumbra of uncertainty between two concepts.
Literally 'peripheral part', can be used for the outer fringe of something, but less specific than 'penumbra'.
The soft edge of a shadow where light and dark blend, used in visual arts.
The English word 'penumbra' is highly technical. In most everyday contexts, Japanese speakers use simpler terms like グレーゾーン for figurative meanings. Reserve 半影 for scientific or artistic discussions.
Explore the penumbra between consciousness and unconsciousness.
The penumbra of the city stretches into ambiguous areas.
Adjust the penumbra of the shadow.