General options:
* Mono-: This prefix indicates "one" or "single," so "monograin" could work in some cases.
* Uni-: Similar to "mono-," this prefix also means "one" or "single." "Unigrain" is another possibility.
Context-specific options:
* Sol-: This prefix means "single" or "alone," but it's often used in contexts like "solitary" or "solo." "Solgrain" might work if you want to emphasize the grain's individual nature.
* Individual-: This is a straightforward and descriptive option, but it might be too long or formal depending on the situation.
Other approaches:
* Single-: While not technically a prefix, using "single" directly before "grain" is clear and concise.
* Individual grain: This is a clearer and more descriptive phrase, but it might be longer than you need.
The best option depends on the specific context and the desired tone. Consider your audience and the overall meaning you want to convey.