stilted

Concise Oxford English Dictionary © 2008 Oxford University Press:
stilted/ˈstɪltɪd/

▶adjective

• 1 (of speech or writing) stiff and self-conscious or unnatural.

• 2 standing on stilts.

• 3 Architecture (of an arch) with pieces of upright masonry between the imposts and the springers.

– derivatives
stiltedly adverb,
stiltedness noun.