If you say that a plan or scheme is afoot, it is already happening or being planned, but you do not know much about it.
例句
Everybody knew that something awful was afoot.大家都知道可怕的事近在眼前。
英漢詞典釋義
adj.
不對勁的(地)
There’s something afoot here, but I don’t know what it is.這里有什么東西不對勁，但我不知道到底是什么。
正在進行的(地)
be early afoot早在進行be well afoot在順利進行中get afoot開始, 實施set afoot著手, 使...開始執行A plan was afoot to seize power.奪權的計劃在進行中。There is a scheme afoot to improve recreational facilities in the area.有一項改善本地區娛樂設施的計劃正在進行。Moves are afoot to increase car insurance premiums.現正在醞釀提高汽車的保險費。Plans are afoot to stage a new opera.上演一部新歌劇的計劃正在醞釀之中。
徒步的(地)，步行的(地)
He traveled afoot.他徒步旅行。
英英詞典釋義
Adjective
1. traveling by foot;
"she was afoot when I saw her this morning"
2. currently in progress;
"there is mischief afoot""plans are afoot""preparations for the trial are underway"
Adverb
1. on foot; walking;
"they went to the village afoot""quail are hunted either afoot or on horseback"