Antonyms of adj cumbrous

1 sense of cumbrous

Sense 1
cumbersome, cumbrous -- (difficult to handle or use especially because of size or weight; "a cumbersome piece of machinery"; "cumbrous protective clothing")

INDIRECT (VIA unwieldy) -> wieldy -- (easy to handle or use or manage; "a large but wieldy book")

Similarity of adj cumbrous

1 sense of cumbrous

Sense 1
cumbersome, cumbrous -- (difficult to handle or use especially because of size or weight; "a cumbersome piece of machinery"; "cumbrous protective clothing")
       => unwieldy (vs. wieldy), unmanageable -- (difficult to use or handle or manage because of size or weight or shape; "we set about towing the unwieldy structure into the shelter"; "almost dropped the unwieldy parcel")