把事情推動起來
這一支就是核心畫面本身：那一推。
noun · C1
The act of making something start to happen, especially by pushing or persuading other people into doing it.
發動；挑起；煽動
核心畫面
One picture will do for this word: a hand at someone's back, giving the first push, and then staying still while everyone else moves. That is what instigation names — not the strike, the inquiry or the quarrel itself, but the push that set it going. The hand usually belongs to someone who takes no further part, which is why the word so often comes up when people are asking who was behind something. It leans towards trouble, though it works perfectly well for neutral beginnings too.
這個字用一個畫面就夠了：一隻手放在別人背後，推了第一下，然後自己不動，讓其他人往前走。instigation 指的就…更多收起
這個字用一個畫面就夠了：一隻手放在別人背後，推了第一下，然後自己不動，讓其他人往前走。instigation 指的就是那一推——不是罷工、調查或爭吵本身，而是讓它動起來的那個動作。推的那隻手通常不再參與後面的事，所以這個字最常出現在「這件事背後是誰」的追問裡。它偏向講麻煩，但用在中性的開端也完全通。From the word’s history
Wiktionary gives the route only: Middle English instigacioun, from Old French instigacïon and Latin instīgātio. The packet does not gloss the Latin root, so nothing more is claimed here.
Wiktionary 只給了傳遞路線：中古英文 instigacioun，來自古法文 instigacïon 和拉丁文 instīgātio。packet 沒有解釋拉丁字根的原義，所以這裡不多作推測。
Wiktionary, 'instigation' etymology, as supplied in this packet (source_ref kaikki:3f6f69a190036ae4:649062145)
Two branches
at somebody's instigation（固定說法）
同一個「那一推」的意思，被鎖進一個固定片語裡，專門用來在句子旁邊點出推的人是誰。
noun · C1
Used in the phrase 'at somebody's instigation' to say that something happened because that person suggested it, asked for it, or pushed for it.
在某人的促使下