越界闖入
三個意思其實是同一個動作套在不同的界線上：軍隊越過國界、人潮湧進一個地方、別人踩進你的私生活。界線可能看得見也可能看不見，但『硬闖進不屬於自己的範圍』這一點不變。
military invasion · noun · B2
One country sending its army across another's border by force to take control.
入侵／侵略
核心畫面
You can picture a line that marks where one space ends and another begins — a border, a threshold, the edge of someone's private world — and then a force pushing hard across that line into ground it was never welcome in. Invasion holds that image of crossing a boundary and pouring into a place that isn't yours.
可以想成有一條界線——國界、門檻，或別人生活的私密圈——然後有一股力量硬是越過那條線，闖進了本來不屬於它、也不歡迎它…更多收起
可以想成有一條界線——國界、門檻，或別人生活的私密圈——然後有一股力量硬是越過那條線，闖進了本來不屬於它、也不歡迎它的地方。invasion 抓的就是這種『越界闖入』的畫面。From the word’s history
Invasion comes from Latin invadere 'to go into, enter as an enemy', made of in- 'in' + vadere 'to go' (the same root that gives us wade). The word is literally 'a going-in' — a force moving across into somewhere, which is exactly the core picture.
invasion 來自拉丁語 invadere『進入、以敵人之姿闖入』，由 in-『進入』加上 vadere『走、去』組成（vadere 也就是英文 wade『涉水前進』的同源根）。這個字字面上就是『走進去』——一股力量越過界線移進某地，正好對應核心畫面。
etymonline.com/word/invasion & /word/invade — Latin invadere, from in- 'in' + vadere 'to go' (root of wade)
One branch
原始詞典資料4 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
invasionnoun/ɪnˈveɪʒən/
- 1
A military action consisting of a large armed force of one geopolitical entity entering territory controlled by another such entity, generally with the objective of conquering territory or altering the established government.
- The invasion and armed suppression, on one occasion after another, of nations seeking to be free was quite consistent with Lenin's views.
- Since Michel's days, however, many barbarian invasions had subdivided the Three Gauls into a melange of warsome states and tribes, all, nevertheless, acquiring a vaguely similar grace, if not a petite grandeur.
- 2
The entry without consent of an individual or group into an area where they are not wanted.
- an invasion of mobile phones
- an invasion of bees
- 3
medicinesciencesThe spread of cancer cells, bacteria and such to the organism.
- The histological diagnosis of PC is currently restricted to lesions showing unequivocal extra-parathyroidal growth, as evidenced by perineural invasion, full thickness capsular invasion with growth into adjacent tissues, extratumoral vascular invasion, or metastasis.
- 4
medicinesciencessurgeryThe breaching of the skin barrier.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。