I am not a native speaker of English and It's become very confusing to understand the meaning of "conceive of" . To conceive means to conceptualize; but why we mostly use preposition of with conceive?
Consider this sentence :
I conceived of a machine that would help the mechanical engineers.
replacing it with conceptualize it becomes :
I conceptualized a machine that would help the mechanical engineers.
It looks perfectly accurate without the preposition for. Can somebody please explain its exact meaning?