For example, I want to say:
This book degrades Western culture.
In this form:
This book has been described as ??? to Western culture.
What would the adjectival form be? Is "degradeful" a word, or is there something better?
The commonest way of employing a verb as an adjective with an active sense—that is, with the sense that the noun modified is something which performs the action of the verb—is to use the present participle: the -ing form:
This book has been described as degrading to Western culture.
Likewise, the commonest way of employing a verb as an adjective with a passive sense , in which the noun modified is something which suffers the action of the verb, is to use the past participle:
Degraded Western culture is incapable of responding to the literary glories of the classics.