remain

To continue to be in the same place, position, or condition; to stay. It can also mean to be left over or to continue to exist after others have gone, been used, or been removed.

• She decided to remain in the city for the summer rather than travel.
• Despite the bad news, he managed to remain calm and focused.
• After everyone left, only a few cookies remained on the plate.

As a singular noun, 'remain' refers to a small part or portion that is left over from something larger, similar to a remnant or a remainder. This usage is less common than its plural form 'remains', which often refers to what is left after a long time, use, or destruction (e.g., archaeological finds, human bodies). In highly specialized or philosophical contexts, 'a remain' might refer to a conceptual fragment or an idea that persists or is left over from a larger system of thought or intellectual tradition. For this specific conceptual nuance, there is no direct, single-word equivalent in Japanese; terms like `概念文` (conceptual text/sentence) might be used but do not fully capture the sense of an idea being a persistent 'leftover' or a vestige from a past intellectual process.

• Only a small remain of the ancient manuscript was decipherable.
• Philosophers sometimes debate what a true conceptual remain of an earlier school of thought might be in modern theory.