upsilon：希腊字母表的第20个字母

来自希腊语u psilon, 即仅u音，比较epsilon.

• inattention
• inaudible
• inaugural
• inaugurate
• inauspicious
• inauthentic
• inboard
• inborn
• inbound
• inbox
• inbred
• inbreed
• inbuilt
• incalculable
• incandescent
• incantation
• incapability
• incapable
• incapably
• incapacitate
• incarcerate
• incarnate
• incarnation
• incautious
• incendiary