4 adjectives to describe glibness

The once goodly row of quartos looks now like a set of mineral teeth that have essayed too closely to simulate Nature by assaulting a Boston cracker; and the intervals of vacuity among the books, as among the incisors, deprive the owner of his accustomed glibness in pronouncing himself on certain topics.

This may seem a hard saying to those who seek, or would impart, mere glibness of phrase without regard for the substancewho worship "words, words, words" without thought of "the matter."

"Singin' bird," replied her husband, with nervous glibness.

"Suppose I win," replied Halibut, with suspicious glibness, "and was so upset that I had one of my bilious attacks come on, where should I be?

4 adjectives to describe  glibness