sergeant
/ˈsɑːdʒənt/noun
1- a rank of non-commissioned officer in the army or air force, above corporal and below staff sergeant陆军（或空军）中士。
1.1
- Brit. a police officer ranking below an inspector〈英〉巡佐; 警察小队长。
1.2
- US a police officer ranking below a lieutenant〈美〉（警察）少尉。
派生词
sergeancy
noun （pl. -ies）词源
Middle English: from Old French sergent, from Latin servient- 'serving', from the verb servire. Early use was as a general term meaning 'attendant, servant' and 'common soldier'; the term was later applied to specific official roles.