- Easy, now especially in a disparaging sense; contemptibly easy. [from 15th c.]
- Lazy, simplistic (especially of explanations, discussions etc.). [from 19th c.]
- Effortless, fluent (of work, abilities etc.). [from 17th c.]
- (now rare) Amiable, flexible, easy to get along with. [from 16th c.]
"His facile disposition made him many friends."
- (chemistry) Of a reaction or other process, taking place readily.
"Decarboxylation of beta-keto acids is facile..."