1) Full of obstacles 2) Full of protuberances; jagged 3) Like rosebushes 4) Problematic 
• (a.) Full of snags; full of short, rough branches or sharp points; abounding with knots. • (a.) Snappish; cross; ill-tempered.
Snag'gy adjective 1. Full of snags; full of short, rough branches or sharp points; abounding with knots. 'Upon a snaggy oak.' Spenser. 2. Snappish; cross; ill-tempered. [ Prov. Eng.]