ungainly - Dictionary definition and meaning for word ungainly
un+ gain=> if u gain (increase) in weight then you cant(un) walk gracefully...
un - not, won't it be AWKWARD if you do NOT GAIN from something?
Gait is a manner of walk....UNGAINLY is to walk clumsily
un gain energy to walk so walking clumsy or awkward
Ungainly and rickety... someone who is unstable on their feet, clumsy.