Here are some examples of how "unwieldy" can be used:
* "The unwieldy box was too large to fit through the door." (Large size makes it difficult to handle)
* "He struggled to carry the unwieldy sack of potatoes." (Weight makes it difficult to handle)
* "The unwieldy design of the chair made it uncomfortable to sit in." (Shape makes it difficult to use)
It can also be used metaphorically to describe something that is difficult to understand or control:
* "The unwieldy bureaucracy made it difficult to get anything done." (System is complex and hard to navigate)
* "Her unwieldy emotions were difficult to manage." (Emotions are intense and difficult to control)
The opposite of "unwieldy" would be something like "manageable," "easy to handle," or "streamlined."