Tra từ bet - Từ điển Oxford Advanced Learner 8th

bet [bet bets betted betting] verb, noun BrE [bet] NAmE [bet]
verb (bet·ting, bet, bet)
1. intransitive, transitive to risk money on a race or an event by trying to predict the result
• You have to be over 16 to bet.
•~ on/against sth I wouldn't bet on them winning the next election.
•~ sth (on sth) He bet $2 000 on the final score of the game.
•~ (sb) (sth) (that…) She bet me £20 that I wouldn't do it.
see also ↑betting, ↑gamble
2. transitive (informal)used to say that you are almost certain that sth is true or that sth will happen
•~ (that)… I bet (that) we're too late.
•You can bet (that) the moment I sit down, the phone will ring.
•~ sb (that)… I'll bet you (that) he knows all about it.
Verb forms:

Word Origin:
late 16th cent.: perhaps a shortening of the obsolete noun abet ‘abetment’.

Thesaurus:
bet verb
1. I, T
•She bet me £20 that I wouldn't do it.
gamble • • stake • • risk •
bet/gamble/stake/risk sth on sth
2. T
•I bet we're too late.
be sure • • be certain • • know • • guarantee •
bet/be sure/be certain/know/guarantee that…
You can bet/be sure/guarantee…

Example Bank:
•He bet $2 000 on the final score of the game.
•I bet we're too late.
•I wouldn't bet on them winning the next election.
•I'll bet you that he knows all about it.
•Not many people are betting against France retaining their title.
•She bet me £20 that I wouldn't do it.
•You can bet that the moment I sit down, the phone will ring.
•You have to be over 16 to bet in the UK.
Idioms: ↑I bet! ▪ ↑I wouldn't bet on it ▪ ↑all bets are off ▪ best bet ▪ ↑don't bet on it ▪ ↑good bet ▪ ↑you bet! ▪ you can bet your life bottom dollar …)

noun
1. an arrangement to risk money, etc. on the result of a particular event; the money that you risk in this way
•to win/lose a bet
•~ on sth We've got a bet on who's going to arrive first.
• He had a bet on the horses.
•They all put a bet on the race.
•I hear you're taking bets on whether she'll marry him.
•I did it for a bet (= because sb had agreed to pay me money if I did).
•‘Liverpool are bound to win.’ ‘ Do you want a bet? ’ (= I disagree with you, I don't think they will.)
2. (informal)an opinion about what is likely to happen or to have happened
•My bet is that they've been held up in traffic.
more at hedge your bets at ↑hedge _v.

Word Origin:
late 16th cent.: perhaps a shortening of the obsolete noun abet ‘abetment’.

Example Bank:
•I made a bet with a friend.
•I was tempted to place a large bet.
•I wish I hadn't agreed to that stupid bet.
•I'm going to place a bet on that white horse.
•My bet is that Canada will win.
•We are now taking bets on the election result.
•‘Liverpool are bound to win.’ ‘Do you want a bet?’
•I did it for a bet.
•I hear you're taking bets on whether she'll marry him.
•to win/lose a bet