His discreet behavior at the party went unnoticed.
discreetly observe
Frequency:
50
%
She discreetly observed the conversation from across the room.
discreetly whisper
Frequency:
45
%
She discreetly whispered the secret to her friend.
Idiomatic Expressions for discreet
Phrase: hush-hush
Meaning: secret or discreet; not to be discussed openly
Usage: The details of the new project are hush-hush until the official announcement next week.