know (someone or something) to (do something)

know (someone or something) to (do something)

To know from experience that someone or something will do something or act in a certain way. Often used in passive constructions. I have always known Sarah to tell the truth, so I believe what she is saying now. The operating system is known to crash if too many programs are running at the same time.
See also: know
Farlex Dictionary of Idioms.
See also:
  • a/the feel of (something)
  • a straw will show which way the wind blows
  • (someone or something) promises well
  • all right
  • (I) wouldn't (do something) if I were you
  • (have) got something going (with someone)
  • (you've) got to get up pretty early in the morning to (do something)
  • a horse of another
  • a horse of another color
  • a horse of another colour