Facile
1. Easily done or performed; not difficult.
2. Arrived at without due care or effort; lacking depth; as, "too facile a solution for so complex a problem."
3. Ignoring the complexities of an issue; superficial.
4. (of an achievement) easily accomplished.
Facile means something that’s easy to understand, or easily accomplished. At one time it could even imply that a person had good manners, or was courteous or affable — in other words someone whose behaviour was easy or effortless.
But with time a second meaning grew up, a derogatory one which is now often the first to be cited in dictionaries: something glib that’s superficially convincing but actually simplistic. If you speak these days of a man with a facile intellect, you’re most likely to be saying that he is shallow of mind and specious of opinion.
Usage
1. Today, the nuclear projects in Iran, Iraq, and North Korea forbid the facile conclusion that the atomic weapons age is conclusively ended.
2. This is a very facile sort of speculation not supported by the facts or by common sense.
Synonyms accomplished, adept, adroit, apparent, articulate, breeze, child's play, cursory, deft, dexterous, effortless, fluent, glib, glib, hasty, light, obvious, practiced, proficient, quick, ready, royal, shallow, simple, skillful, smooth, superficial, uncomplicated, untroublesome, vocal, voluble,