safely

adv. con toda seguridad, seguramente, sin temor a equivocarse; sin ningún daño, con seguridad, sin percances

con seguridad | sin peligro | sin ocasionar daños | sin percances | en forma segura

Ex: Until recently movable shelving was used mainly in closed access stacks, but since some systems can be operated safely by anyone, it is being used increasingly in open access stacks.

= sin peligro alguno, sano y salvo, con toda seguridad
Ex: Until recently movable shelving was used mainly in closed access stacks, but since some systems can be operated safely by anyone, it is being used increasingly in open access stacks.