那隻蟲，以及把牠清掉
這一組就是核心畫面本身：一隻在毛髮上的小蟲，還有人對牠做的事。
noun · B2
A very small insect with no wings that lives on the hair or the skin of a person or an animal and feeds on their blood. It makes the skin itch, and it passes easily from one body to another.
蝨子
核心畫面
A tiny wingless insect holding on to hair or skin, feeding on the blood of whoever it is riding on. It arrives without being invited, it is hard to see, and it is hard to get rid of. The other uses grow out of that one picture: the work of picking the insects off, and the name thrown at a person who lives off other people and makes them feel unclean.
louse 的核心畫面可以想成：一隻很小、沒有翅膀的蟲，牢牢抓著頭髮或皮膚，靠吸主人的血過日子。牠不請自來，不容易看…更多收起
louse 的核心畫面可以想成：一隻很小、沒有翅膀的蟲，牢牢抓著頭髮或皮膚，靠吸主人的血過日子。牠不請自來，不容易看見，也不容易趕走。從這幅畫面往兩邊走：一邊是把蟲一隻一隻抓下來的動作，一邊是拿牠來罵人——說某個人像那隻蟲，靠別人過活，又讓人渾身不舒服。From the word’s history
Middle English lous, from Old English lūs, from Proto-Germanic *lūs; cognate with German Laus and Dutch luis. The insect meaning has stayed almost unchanged the whole way.
中古英語 lous ← 古英語 lūs ← 原始日耳曼語 *lūs，德文 Laus、荷蘭文 luis 同源。指「蟲」的意思一路幾乎沒有變過。罵人的用法是後來的比喻，來源資料沒有把它記成字源的一部分。
Wiktionary entry supplied in this packet (source_ref kaikki:3f6f69a190036ae4:313439241:101594)
Two branches
拿這隻蟲罵人
把人放進那幅畫面裡：貼著別人、靠別人過活、還讓人不舒服的那一隻。
noun · C1
A mean, unpleasant person who treats other people badly, especially by lying to them, using them, or letting them down. It is an insult, used in casual speech, and it now sounds old-fashioned.
卑鄙的人
原始詞典資料6 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。
lousenoun詞源 1/laʊs/
- 1
A small parasitic wingless insect of the order Psocodea.
- 2
datedA contemptible person; one who is deceitful or causes harm.
- He said: "Thanks, friend; but you're wasting your time. You better warn Crocker. If that louse makes a play for me, he'll get hit with Chicago lightning!"
- It's then that those louses go back to their spouses. Diamonds are a girl's best friend.
- 3
slangcomputingengineeringmathematicsThe currency sign ¤.
louseverb詞源 1/laʊs/
- 1
To remove lice from; to delouse.
- ‘Nor have I combed, washed or loused myself this six months past, there being so few daring deeds to do on this Highway.’
- There were a few wire-netted enclosures to keep young chickens from the hawks, but the fowls wandered at large, coming about the hut to ruffle their feathers in the dust, and louse themselves, and pick up scraps.
這個拼法也被記錄為下列字的變化形：
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。