Picture something that is not firmly held in place — a shelf whose screws are half out. It has not fallen yet, but nothing guarantees it will still be there tomorrow. That wobble is insecure, whether it is a shelf, a job, or a person's sense of themselves.
From the word’s history
in- (not) + Latin securus, which itself is se- (without) + cura (care, worry) — literally 'without worry'. So insecure is 'not without worry': the thing still needs watching. That is why the word runs so easily from a wall to a bank account to a feeling — in every case something is still asking to be worried about.
in-（不）加上拉丁文 secūrus，而 secūrus 本身是 se-（沒有）+ cūra（掛心、憂慮），字面就是「不用擔心的」。所以 insecure 拆到底是「還是得擔心的」——那個東西還沒有讓你放下心來。這正好說明為什麼這個字可以從一面牆滑到一個銀行帳戶、再滑到一種心情：每一種情況裡，都還有東西懸在那裡，向你討一份不安。同一個 cūra 也躲在 cure、curious 裡。
Wiktionary: insecure < in- + secure; Latin sēcūrus < sē- ('without') + cūra ('care')
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原始詞典資料2 筆記錄
以下是外部詞典記錄的用法，摘錄並精簡格式，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。
insecureadj/ɪnsəˈkjʊə(ɹ)/
- 1
Not secure.
- It was, as Carrados explained, entirely his own preposterous fault. Nothing but curiosity about the size of the room had impelled him to touch the walls, and the picture, having a weak cord or an insecure nail ... had it not brought something else down in its fall?
- The Yung-li ruler, finding Chao-ch’ing insecure, fled to Wu-chou (梧州), Kuangsi province, and then to Kuei-lin, vigorously pursued by the Manchu army.
- 2
Not comfortable or confident in oneself or in certain situations.
- He's a nice guy and all, but seems to be rather insecure around other people.
- Imagine being so insecure that you make it against the law for folks to dislike you.
摘錄自 英文維基詞典 English Wiktionary，已精簡格式；依 CC BY-SA 4.0 授權使用，改動後的內容同樣以此授權提供。