Thorny (adjective)

1. Full of or covered with thorns.
2. Having or being a problem or obstacle that is difficult to overcome or avoid.

Origin:

Derived from the old english word "thorn" meaning a sharp point.

Examples:

1. The rose bush was thorny.
2. The issue was thorny and difficult to resolve.
3. The decision was thorny, as it would affect many people.
4. The path was thorny and overgrown.
5. The relationship was thorny and full of conflict.