No. 16,770 in Russian
сложнейшие
"Most complex" or "most difficult."
In a sentence
Я изучаю сложнейшие математические теории.
I study the most complex mathematical theories.
The word 'сложнейшие' is used in its superlative form to describe the theories as exceptionally complex.
Он преодолел сложнейшие испытания в своей жизни.
He overcame the most difficult challenges in his life.
The word 'сложнейшие' is used to emphasize the severity and difficulty of the challenges presented.
Эта задача оказалась одной из сложнейших за всю карьеру.
This task turned out to be one of the most complex in the entire career.
The word 'сложнейшие' is used to classify the task within a group of exceptionally difficult ones.
Hear it in real podcasts
The recording above is a synthetic voice. Hear how people say “сложнейшие” in actual Russian podcasts.
Find “сложнейшие” in podcastsLearn it from shows you like
LangTurbo plays Russian podcasts with a transcript and the English under every line. Tap a word like this one and it tells you what it means right there. For iPhone, iPad and Android.
Learning English?
LangTurbo plays real English podcasts with every line translated into русский, and tells you what any word means in that sentence. For iPhone, iPad and Android.
Russian books and courses on Amazon (an affiliate link: a purchase through it supports this site).