In English, verbs can be conjugated both in the active and passive voice. It makes it possible to distinguish who is doing the action and who/what the action is done on/against.
e.g.
|--------------------|-----------------------|-----------------------------|
| | active voice | passive voice |
|--------------------|-----------------------|-----------------------------|
| infinitive | to ride | to be ridden |
| present simple | (the rider) rides | (the horse) is ridden |
| continuous present | (the rider) is riding | (the horse) is being ridden |
|--------------------|-----------------------|-----------------------------|
Also, the language makes it possible to turn verbs into adjectives, by adding the -able or -ible suffixes, to mean "that can be ...". But this only works for the passive voice.
Is there a specific suffix (or a word that can reproduce that) that can turn a verb into an adjective at the active voice, with the meaning of "that can ..." instead of "that can be ..."?
e.g.
|------------|------------------|-------------------------|
| | active voice | passive voice |
|------------|------------------|-------------------------|
| infinitive | to ride | to be ridden |
| adjective | (the rider is) ? | (the horse is) rideable |
|------------|------------------|-------------------------|
How would I say, with only one word, that the rider is able to ride a horse?
Edit: I'll give a bit more context. I'm a software engeneer and was looking for a way to name a file (short name for something that can do some thing). Found this question that is closely related to mine. I think I'll just go with "can" as a prefix for the verb (and "canBe" for more consistency). e.g. "canPrint" and "canBePrinted".