Highly strained (in various senses); greatly or unnaturally forced or laboured.

Forced, as opposed to natural.

In literary usage: Strained, distorted. Cf. force, v.1 3b.

That is or has been excessively strained.

Of language, construction put upon words or actions, etc.: employed or interpreted in a laboured, far-fetched, or non-natural sense; wrested or…

Overstrained.

Smartness in speech or writing, esp. of a forced or artificial nature. Obsolete.