undivided attention

Translations
неразделённое внимание
He gave her his undivided attention during the meeting.
Он уделил ей своё неразделённое внимание во время встречи.
Definitions
Complete focus and concentration on a person, task, or activity, without any distractions or divided interests.
Words
undivided

adjective
нераздельный
attention

noun
внимание