Facile

adjective

1. Easy, now especially in a disparaging sense; contemptibly easy.
2. Amiable, flexible, easy to get along with.

   "His facile disposition made him many friends."

3. Effortless, fluent (of work, abilities etc.).
4. Lazy, simplistic (especially of explanations, discussions etc.).
5. Of a reaction or other process, taking place readily.

   "Decarboxylation of beta-keto acids is facile..."