" be (to) "

[Idiom]  | "be apprenticed to" 

1: to begin serving as an apprentice to

[Idiom]  | "be/fall prey to" 

1: to be killed by (an animal, disease, etc.)

2: to be harmed or affected in a bad way by (someone or something)

[Idiom]  | "be going to" 

1: —used to talk about what will happen or could happen

[Idiom]  | "be hard/tough to beat" 

1: to take some considerable effort to match or surpass

[Idiom]  | "be put to death" 

1: to be killed at a scheduled time by someone who is legally allowed to do so

[Idiom]  | "be resigned to" 

1: to accept a bad situation that cannot be changed

[Idiom]  | "be supposed to" 

1: to be expected to do something

2: to be intended or expected to be something

3: —used to show that one is angry or offended by something

[Idiom]  | "be to do with" 

1: to relate to (something) : to be about (something)

2: to relate to or involve (someone)

[Idiom]  | "be witness to" 

1: to see (something) happen

[Idiom]  | "leave someone to his or her own devices" 

1: to allow (someone) to do what he or she wants or is able to do without being controlled or helped by anyone else —often used as be left to one's own devices

[Verb]  | "be (to)" 

[Phrase]  | "be partial to"