be at a loss

Translations
быть в растерянности
He was at a loss for words during the interview.
Он был в растерянности во время интервью.
Definitions
To be unable to think of something to say or do; to be confused or uncertain about how to proceed in a situation.
Words
be

verb
быть
at

preposition
в
a

article or possessive pronoun
неопределённый артикль
loss

noun
растерянность