英文semi意思

"Semi" is a prefix or word part that is derived from the Latin word "semis," which means "half." It is commonly used in English to form adjectives and nouns that indicate a partial or incomplete state, or something that is halfway between two extremes. Here are some examples of how "semi" is used in English:

1. Semi-automatic - Refers to a device that operates with partial automation, typically requiring the user to perform one step while the device completes the rest.

2. Semi-final - A competition round or match that is the last before the final, where the winner(s) advance to the final.

3. Semi-truck - A large truck with a trailer that is used for transporting goods over long distances. The term "semi" refers to the fact that it is only half of a full truck and trailer combination, as the trailer is not fully connected to the cab.

4. Semi-circle - A half circle, or a portion of a circle that is one-half of its circumference.

5. Semi-permeable - Describing a membrane that allows some substances to pass through while blocking others.

6. Semi-retired - Refers to someone who has partially retired from their job or career, often working fewer hours or taking on less demanding duties.

7. Semi-formal - A dress code that is more formal than casual but less formal than black tie or full formal attire.

8. Semi-conductor - A material that has electrical conductivity between that of a conductor and an insulator, typically used in electronic devices.

9. Semi-arid - Describing a climate or region that is dry, but not as dry as a desert.

10. Semi-professional - Refers to someone who engages in an activity or profession at a level just below what is considered fully professional.

The meaning of "semi" can vary slightly depending on the context, but it generally implies a state or condition that is halfway between two extremes or that involves some degree of partiality.