hermetic
- adj. 密封的
- adj. 与外界隔绝的
- Definition
- adj. tightly sealed against air
- adj. completely cut off from outside influence
- Example
- The jar has a hermetic seal that keeps the food fresh.
- 这个罐子有密封性极好的盖子，能让食物保持新鲜。
Synonyms & Differences 近义词辨析
Compared meaning: completely sealed, letting nothing through (adjective).
比较义项：密封的（形容词）。
- tight
Common, everyday word for closed firmly so little air or liquid can pass through; used in casual, general contexts and not necessarily airtight.
常用口语词，指关得很紧、几乎不透气或不透水；用于日常泛指的语境，未必完全密封。
Make sure the jar's lid is on tight, or the cookies will go stale.
确保罐子的盖子拧得很紧，不然饼干会受潮变软。
- hermetic 本词
Formal, technical term meaning completely sealed against air or gas, typically used for scientific or industrial containers; stronger and more precise than tight.
正式的专业术语，指完全隔绝空气或气体的密封，多用于科学或工业容器，比tight的密封程度更强、更精确。
The vials use a hermetic seal to keep out moisture and oxygen.
这些小瓶采用hermetic密封，以防止潮气和氧气侵入。
Both words can mean sealed, but tight is common and everyday, meaning closed firmly so little air or liquid passes through. Hermetic is formal and technical, meaning completely sealed against air or gas, used mainly in science or industry. Their other meanings are not compared.
这两个词都可以表示“密封”，但语气和使用场合不同：tight是口语常用词，泛指关得很紧、不易漏气或漏水；hermetic是正式的专业术语，强调完全隔绝空气或气体，常见于科学、工业语境。这里不比较tight表示“紧身、合身”的意思，也不比较hermetic的比喻义“与外界隔绝的”。