A deep-rooted habit, idea, or belief is so strong in a person or a society that it is very hard to change or destroy. The picture is a plant whose roots go a long way down: you can cut the top, but the thing keeps living underneath.

A deep-rooted habit, idea, or belief 一個deep-rooted的習慣、想法或信念 is so strong in a person or a society 在一個人或一個社會裡根深蒂固 that it is very hard to change or destroy 難以改變或摧毀 The picture is a plant whose roots go a long way down 畫面是一株根扎得很深的植物 you can cut the top 你可以剪掉上面的部分 but the thing keeps living underneath 但底下的東西還是活著

We use it for what has been there a long time — a tradition, a prejudice, a way of treating family, a fear of speaking up — not for a mood that started this morning.

We use it for what has been there a long time 我們用這個字形容存在很久的東西 a tradition, a prejudice, a way of treating family, a fear of speaking up 像傳統、偏見、對待家人的方式、不敢開口的恐懼 not for a mood that started this morning 而不是形容今天早上才有的情緒

You will almost always see it in front of a noun, and with a hyphen: a deep-rooted custom.

You will almost always see it in front of a noun 你幾乎都會看到它放在名詞前面 and with a hyphen 而且中間有連字號 a deep-rooted custom 像a deep-rooted custom

Though actually, the words deep-rooted and deep-seated are near twins, and newspapers mix them freely. If you want a tiny difference, deep-rooted slightly suggests something that grew in over years, like roots; that is only a shade, not a rule.

Though actually 不過其實 the words deep-rooted and deep-seated are near twins deep-rooted和deep-seated這兩個字幾乎是雙胞胎 and newspapers mix them freely 報紙常常兩個混著用 If you want a tiny difference 如果真的要挑一點差異 deep-rooted slightly suggests something that grew in over years, like roots deep-rooted比較帶有「像根一樣，經過多年長進去」的感覺 that is only a shade, not a rule 但這只是一點語感差異，不是規則