Sententious

sententious \sen-ˈten(t)-shəs\ adjective: 1 a. given to or abounding in aphoristic expression, b. given to or abounding in excessive moralizing, 2. terse, aphoristic or moralistic in expression; pithy, epigrammatic

Etymology: Middle English, full of meaning, from Latin sententiosus, from sententia sentence, maxim

I can picture a snake slowly whispering this word.