As an adjective unsafe
is not safe; dangerous.
As a verb ensafe is
to make safe; to secure.
unsafe
English
Adjective
(-)
not safe; dangerous
Synonyms
* (not held or fixed securely and likely to fall over) precarious, rickety, shaky, tottering, unsteady, unstable, wobbly
ensafe
English
Verb
(
ensaf)
(obsolete, transitive, rare) To make safe; to secure.
- (Hall)
(
Webster 1913)