A chemical you spray or pour on ground to kill unwanted plants.

you spray or pour你噴灑或倒 on ground在地上、to kill unwanted plants用來殺死不要的植物的 A chemical化學藥劑

Farmers use it on fields, councils use it on pavements and roadsides, and ordinary people buy a bottle for the cracks in the driveway. It is a countable-ish everyday word — "a weedkiller" for a particular product, "weedkiller" uncountable for the stuff in general.

Farmers農夫 on fields在田裡 use it會用、councils市政單位 on pavements and roadsides在人行道和路邊也會用、ordinary people一般人 for the cracks in the driveway則為了車道的裂縫 buy a bottle買一瓶。It is它是 a countable-ish everyday word一個半可數的日常用字——for a particular product指特定產品時說 "a weedkiller"「a weedkiller」，for the stuff in general泛指這類東西時 uncountable就不可數地說「weedkiller」。

Written as one word in British English, though you will also see "weed killer" as two, and both are read the same.

in British English在英式英文裡 written as one word寫成一個字、though you will also see不過你也會看到 "weed killer" as two寫成兩個字的「weed killer」、and both are read the same兩種唸法都一樣。

The technical word, the one on the label and in news reports, is herbicide. Some weedkillers kill everything they touch; others are made to kill broad-leaved weeds and leave grass alive. The word often shows up in worried contexts — safety, run-off into water, whether a particular brand causes cancer — because it is, plainly, poison, and people who use it are supposed to wear gloves.

The technical word專業說法、the one on the label and in news reports也就是標籤和新聞報導上會用的字、is herbicide是 herbicide。Some weedkillers有些除草劑 kill everything they touch碰到什麼就殺什麼；others有些則 are made to kill broad-leaved weeds設計來只殺闊葉雜草、and leave grass alive讓草留著活。The word這個字 often shows up in worried contexts常出現在令人擔心的語境裡——safety安全、run-off into water流入水源、whether a particular brand causes cancer某個牌子是否致癌——because it is, plainly, poison因為說白了它就是毒藥、and people who use it are supposed to wear gloves用的人應該戴手套。