* -ing: This suffix can be added to verbs to form participles, which can often act as adjectives. For example, "longing" means "having a strong desire for something" and implies a prolonged feeling.
* -y: This suffix can be added to nouns to form adjectives. For example, "lengthy" means "long in duration."
* -ed: This suffix can be added to verbs to form participles that describe a state of being. For example, "lengthened" means "made longer."
* -some: This suffix can be added to nouns to form adjectives, often with a connotation of something being impressive or notable. For example, "longsome" means "long and tedious."
It's important to note that these suffixes can also create other meanings depending on the word they are attached to.
If you're looking for a suffix that specifically means "long" in a literal sense, you might consider using "long" itself as an adjective. You could also use other words like "extended" or "prolonged" depending on the context.