Of a course of action: not attended by risk of failure, prudent. Obsolete.

Presenting no risk of physical harm; posing no threat, not dangerous.

Without danger; free from danger.

Scottish. In accordance with what is right or natural; safe; spec. safe to be involved with. Chiefly in negative constructions. Cf. uncanny, adj. 4.

free from peril, safe.

Of an action or state: without risk or danger; safe.

Not perilous.

(un-, prefix1 affix 1.)

Free from risk or danger.

Free of risk; (also) cautious, unadventurous.