抓到人、識破局
這一支就是核心畫面本身，手真的合起來抓到人。
interjection · B1
Said at the moment you catch someone, or at the moment a trick or joke of yours works and the other person finds out. It is the spoken way of saying 'I have got you'.
抓到你了
核心畫面
You can think of gotcha as the sound of a hand closing. One person now has the other, and both of them know it. Everything the word does afterwards is that same closing hand pointed somewhere else: onto the words someone just said (your meaning is in my hands now), onto a person who needed holding (you are safe, I have you), or onto a trap that sits quietly and closes on whoever walks past. The word is always the moment of contact, never the long state that follows.
gotcha 可以想成是手掌合起來的那一聲。一方抓住了另一方，而且兩邊都知道了。它其他的用法，就像同一隻手指向不同的…更多收起
gotcha 可以想成是手掌合起來的那一聲。一方抓住了另一方，而且兩邊都知道了。它其他的用法，就像同一隻手指向不同的東西。指向對方講的話，就是「你的意思我拿到了」。指向需要撐住的人，就是「有我在，你穩了」。指向一個沒人注意的細節，就是那個等著合起來的坑。不管哪一種，它講的都是接觸的那一秒，不是後面那段時間。From the word’s history
The packet's source entry records gotcha as a pronunciation spelling of got you, built from got plus -cha. So the word is literally the sentence I have got you, said fast enough to fuse.
資料來源把 gotcha 記成 got you 的口語拼法，結構是 got 加上 -cha。也就是說，這個字本身就是 I have got you 這句話講快之後黏成的一團，難怪每個用法都圍著「我抓到你了」在轉。
Wiktionary entry supplied in this packet (kaikki extract, source_ref kaikki:3f6f69a190036ae4:916970426): 'From got + -cha'; 'Pronunciation spelling of got you.'
Three branches
話收到了
抓的東西從人換成話。對方的意思現在在我手上了，所以可以往下走。
interjection · B1
Said to show that you have heard what someone told you and you understand it.
了解／收到
我接住你
同一隻手，目的相反。不是把人扣住，而是把人托住。
interjection · B2
Said to tell someone that you have them — that you are holding them, covering for them, or taking care of the thing they were worried about, so they can stop worrying.
我接住你了／交給我