in his lectures he reveals himself to be a merely perfunctory speaker.
"Perfunctory" is an adjective. It describes an action that is done with little interest or enthusiasm.
Perfunctory
easily perfunctory
I think you mean perfunctory, which means in a habitual manner. He had done the same thing so many times that it was perfunctory now.
In answer to my question, he gave a perfunctory nod. The operator answered the call with a perfunctory greeting. The movie star, who was coerced into the movie because of her contract, gave out perfunctory comments to the media. Because he made a perfunctory effort on his project, he received a low grade.
He received perfunctory applause, but his performance was not very good.
This is a perfunctory answer - it responds to the question but without thought.
He gave a quick, perfunctory answer to the question and did not bother to elaborate.
The professors perfunctory approach to teaching led his students to feel uninspired and lackadaisical!
Prefunctory is NOT a word and therefore should never be used in a sentence, regardless of any perfunctory ends the aforementioned question endeavours to meet. Perfunctory means routine or disinterested, almost automated, as in, ' The janitor performed his duties in a perfunctory fashion.'
In answer to my question, he gave a perfunctory nod. The operator answered the call with a perfunctory greeting. The movie star, who was coerced into the movie because of her contract, gave out perfunctory comments to the media. Because he made a perfunctory effort on his project, he received a low grade.