Picture pressure coming from outside: a door pushed open, a person made to work, a situation that leaves no time to think, a smile pressed onto a face. Every use of forced has that push in it. What changes is who is pushing — a hand, a person with power, or the circumstances themselves.
From the picture
情況施力
推力還在，但推的人不見了。換成引擎故障、水管爆掉、球員受傷，逼著事情非發生不可。
adjective · B2
Done suddenly because the situation leaves no other choice, not because anyone planned it or wanted it. In this meaning it usually goes in front of a noun, as in a forced landing.
被迫的（情況所逼）
硬擠出來的樣子
推力最後落到表情和語氣上。笑容是被擠出來的，不是自己冒出來的，而且旁人看得出那份力氣。
adjective · B2
A forced smile, laugh or cheerful voice is made on purpose and does not come from a real feeling. You can usually tell that the person is working at it.
勉強的／擠出來的
adjective · B2
Opened or got into by breaking it or pushing hard, instead of by using a key or the normal way.
被撬開的／強行打開的
adjective · B2
Made to happen to people because someone with power over them makes it happen, not because they agreed to it. Used before nouns such as labour, marriage, eviction and removal.
強迫的
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。
forcedadj/fɔɹst/
Obtained forcefully, not naturally.
Opened or accessed using force.
Produced by strain; not spontaneous; insincere.
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。