General quality:
* -able: Indicates capability or suitability, suggesting good quality. For example, "durable" means able to last, implying good quality.
* -ful: Indicates fullness or abundance, often implying a positive quality. For example, "beautiful" means full of beauty.
Specific qualities:
* -ous: Indicates a state or condition, often used to describe a quality. For example, "dangerous" indicates a state of being dangerous.
* -ic: Indicates a quality or characteristic, often used for abstract concepts. For example, "historic" indicates a quality of being historically significant.
* -al: Indicates a quality or characteristic, often used for abstract concepts or states. For example, "musical" indicates a quality of being related to music.
* -ary: Indicates a quality or characteristic, often related to a specific field or activity. For example, "literary" indicates a quality related to literature.
Negative qualities:
* un-: Indicates the absence of a quality. For example, "unhealthy" means lacking health.
* in-: Indicates the absence or opposite of a quality. For example, "incomplete" means lacking completeness.
* mal-: Indicates bad or ill. For example, "malnourished" indicates a state of being poorly nourished.
Ultimately, the best prefix to use will depend on the specific quality you want to convey and the context in which it is used.