’I won’t take the valve apart now,’ he said, and began taking it apart, working with slow, tireless, interminable precision, his rustic, ungainly face bent very close to the floor, picking painstakingly at the minute mechanism in his fingers with such limitless, plodding concentration that he seemed scarcely to be thinking of it at all.
There are no more uses of "ungainly" in the book.
Show samples from other sources
At that she flung her head high, spun on her ungainly legs and gallumphed back down the ridge apparently more indignant than afraid.
Farley Mowat -- Never Cry Wolf
We struggle with the ungainly thing, making all kinds of clanking noises as we wobble down the stairs.