Here are some possibilities:
* -al: This is a common suffix in English, usually indicating belonging to, related to, or characterized by. For example, "national" means "belonging to a nation," "seasonal" means "related to a season," and "magical" means "characterized by magic."
* -mal: This suffix is very rare in English. It might appear in some technical or specialized terms, but it's not used in general vocabulary.
* -ful: This suffix means full of, characterized by, or having the quality of. For example, "beautiful" means "full of beauty," "thankful" means "characterized by thankfulness," and "helpful" means "having the quality of being helpful."
If you provide more context, like the specific word you're thinking of, I can give you a more accurate answer.