sir A2

/sɝ/ a polite way of addressing a man, especially one you do not know or who is older or more important

senior A2

/ˈsinjɚ/ Higher in rank, position, or importance than others.

sire C2+

/ˈsaɪɚ/ a male parent of an animal, or a respectful address to a king

surly C2+

/ˈsɜrli/ bad-tempered and unfriendly

seniority C2+

/ˌsinˈjɔrəti/ the state of being older or higher in rank or length of service