fall out of the sky

Translations
упасть с неба
The solution seemed to fall out of the sky.
Решение как будто упало с неба.
Definitions
To suddenly and unexpectedly descend from the air, often referring to something or someone dropping from above, typically due to failure or accident; can also be used figuratively to describe something happening abruptly and without warning.
Words
fall

verb
падать
out

adverb
вниз
of

preposition
из
the

article or possessive pronoun
определённый артикль
sky

noun
небо