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"Estar seguro" is an intransitive verb phrase which is often translated as "to be safe", and "de qué" is a phrase which is often translated as "what". Learn more about the difference between "estar seguro" and "de qué" below.
estar seguro(
ehs
-
tahr
seh
-
goo
-
roh
)An intransitive verb phrase is a phrase that combines a verb with a preposition or other particle and does not require a direct object (e.g., Everybody please stand up.).
a. to be safe
Construyeron refugios antiatómicos donde la población podía estar segura.They built nuclear shelters where the population could be safe.
a. to be sure
Esta es la forma correcta de hacerlo. - ¿Estás segura?This is the right way to do it. - Are you sure?
a. to be confident
Jim estaba muy seguro de sí mismo, pero yo no veía las cosas tan claras como él.Jim was very self-confident, but I didn't see things as clearly as he did.
de qué(
deh
keh
)A phrase is a group of words commonly used together (e.g., once upon a time).