guess (someone's) mind

Translations
угадывать (чьи-то) мысли
He tried to guess her mind, but it was impossible.
Он пытался угадать её мысли, но это было невозможно.
Definitions
To try to determine or predict what someone else is thinking or feeling, often without them explicitly stating it.
Words
mind

noun
ум
guess

verb
угадывать