- A hole, usually with a cover, through which a person may enter a sewer, boiler, drain, or similar structure.下水道出入孔：一种常带有盖的孔道，人可以由此孔进出排道、锅炉、下水管或类似设施
- complainant
- complainants
- complained
- complaining
- complains
- complaint
- complaints
- complaisance
- complaisances
- complaisant
- compleat
- complect
- complected
- complected
- complecting
- complection
- complects
- complement
- complemental
- complementaries
- complementarities
- complementarity
- complementary
- complementary angles
- complementary color