with due respect

with due respect
with (all) due respect phrase
used when you are going to disagree with someone or criticize someone, in order to sound more polite

With due respect, is that question relevant?

with (all) due respect to:

With all due respect to the staff, I think the exam results could have been better.

Thesaurus: ways of making or receiving criticism or blamehyponym to criticize, accuse or blamesynonym
Main entry: due

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with (all) due respect — see respect, 1
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Main Entry:due

Useful english dictionary. 2012.