Her down-filled coat was cumbersome in the small airplane seats.
the karate kid failed his test on balancing because he was unwieldy
Sometimes I can be so cumbersome when I trip over an electricity cord.
I have become cumbersome in my old age. The cumbersome lady tripped over her own feet in the grocery store. Cumbersome means clumsy.
The cumbersome boots he wore made it difficult to walk.