be on
verb- To be performative or funny in a wearying manner. · You don't have to be on all the time.
- To be responsible for (something). · That task is on you.
- To be up to; to be engaged in or scheduled to do imminently. · What are you on today?
From the library
Be on guard against men who can strike from a distance.
You’ll take my advice and still be on your guard.”
“Be as quick as possible, I must be on the road in a quarter of an hour.”
If Bonaparte landed at Naples, the whole coalition would be on foot before he could even reach Piombino; if he land in Tuscany, he will be in an unfriendly territory; if he land in France, it must be with a handful of men, and the result of that is easily foretold, execrated as he is by the population.
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