tread lightly

Translations
действовать осторожно
He decided to tread lightly when discussing the sensitive topic.
Он решил действовать осторожно, обсуждая деликатную тему.
Definitions
To proceed with caution or care, especially in a sensitive situation, to avoid causing harm or offense.
Words
tread

verb
ступай
lightly

adverb
осторожно