swear (swears 3rd person present) (swearing present participle) (swore past tense) (sworn past participle )
1 verb If someone swears, they use language that is considered to be rude or offensive, usually because they are angry.
It's wrong to swear and shout... V
They swore at them and ran off. V at n
2 verb If you swear to do something, you promise in a serious way that you will do it.
Alan swore that he would do everything in his power to help us... V that
We have sworn to fight cruelty wherever we find it... V to-inf
The police are the only civil servants who have to swear allegiance to the Crown... V n
I have sworn an oath to defend her. V n
3 verb If you say that you swear that something is true or that you can swear to it, you are saying very firmly that it is true., (emphasis)
I swear I've told you all I know... V that
I swear on all I hold dear that I had nothing to do with this... V on/by n that
Behind them was a confusion of noise, perhaps even a shot, but he couldn't swear to it. V to n
4 verb If someone is sworn to secrecy or is sworn to silence, they promise another person that they will not reveal a secret.
usu passive
She was bursting to announce the news but was sworn to secrecy. be V-ed to n
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sworn swear by phrasal verb If you swear by something, you believe that it can be relied on to have a particular effect.
INFORMAL Many people swear by vitamin C's ability to ward off colds. V P n swear in phrasal verb When someone is sworn in, they formally promise to fulfil the duties of a new job or appointment.
usu passive
Soon after the New Year, the new Congress will come to Washington to be sworn in. be V-ed P