Unable and Ungainly

Unable adjective - Lacking qualities (as knowledge, skill, or ability) required to do a job.

Ungainly and unable are semantically related. In some cases you can use "Ungainly" instead an adjective "Unable".

Ungainly adjective - Difficult to use or operate especially because of size, weight, or design.

Unable and ungainly are semantically related. Sometimes you can use "Unable" instead an adjective "Ungainly".