Question

What is a verb for "aphorism" or "sententious"?

Answer 1

Please see below.

Explanation:

Aphorize -- verb -- to speak or write in aphorisms

"sententious" can mean containing many aphorisms in which case the verb is "aphorize".

"sententious" can also mean overly moralistic, or self-righteous, or sanctimonious. In this case we might want the verb "moralize" or (less negatively) "preach".