A factitive verb is a causative verb based on an adjective (or on a stative intransitive verb).

Examples: Engl. blacken (tr.) from black, German schwärzen from schwarz, German töten 'kill' from tot 'dead'.

While there may be a subordinate agent in a causative construction, there may be none in a factitive one. This has sometimes been a reason for not subsuming factitive under causative.