綁緊、固定住
最貼近那隻握緊的手：東西被鎖、被扣、被綁、被扶住，緊到不會鬆脫。
r · B1
Tied, fixed, closed or held so tightly that something cannot move, fall, or come open, usually so that it stays safe.
牢牢地
核心畫面
One way to hold securely in mind: a hand closing tight around something so that it cannot slip. What the hand holds can change — a suitcase strap, a card number, a custom a town has kept for years — but the grip is the same. The word never describes the thing itself. It describes how tightly the holding is done.
「securely」可以想成一隻手把東西握緊，緊到滑不掉。手裡握的是什麼都可以：行李的帶子、一組卡號、一個小鎮做了很…更多收起
「securely」可以想成一隻手把東西握緊，緊到滑不掉。手裡握的是什麼都可以：行李的帶子、一組卡號、一個小鎮做了很多年的習慣。握法都一樣。它從來不是在形容東西本身，而是在形容「抓得有多牢」。From the word’s history
The packet records securely as secure plus the adverb ending -ly, reaching modern English through Middle English -ly. The ending is what turns a state (safe) into a manner (done in a safe, tight way).
資料把 securely 記成 secure 加上副詞字尾 -ly，經由中古英語的 -ly 來到現在的英文。這個字尾正好說明它的位置：把「安全」這個狀態，變成「動作做得安全、做得牢」的方式。
Wiktionary (kaikki extract, source_ref kaikki:3f6f69a190036ae4:976168892)
Two branches
守得住：不會被偷，也不會垮掉
同樣是握緊，只是握的東西看不見了。握住的是資料和金錢，是一個制度在社會裡的位置。手一樣沒鬆。
r · B1
In a way that keeps something safe from being stolen, lost, or reached by the wrong people, especially money, data, and personal information.
安全地