Multi-Translation Layout:  

Psalm 64:4

4 That they may shoot in secret at the perfect: suddenly do they shoot at him, and fear not.

Psalm 64:4

4 to shoot innocent men from ambushes.
They shoot at him suddenly and fearlessly.

Psalm 64:4

4 That they may shoot in secret at the perfect: suddenly do they shoot at him, and fear not.

Psalm 64:4

4 So that in secret they may let loose their arrows at the upright, suddenly and unseen.