Sir – monsieur
(Pronounced muh-suher)
To remember that sir is pronounced muh-suher (monsieur) in French, use the following mnemonic:
Sir, I must now measure (monsieur) the length of your leg.

Examples of monsieur (sir) in a sentence
Excusez-moi, monsieur, quelle heure est-il?
(Excuse me, sir, what time is it?)
Merci, monsieur.
(Thank you, sir.)
Monsieur, vous avez oublié votre parapluie!
(Sir, you forgot your umbrella!)