enter into

verb4

1. •
   to penetrate
2. •
   To become legally committed to.

   • One must be of legal age to enter into a contract.
3. •
   To engage in a formal or informal process.

   • The country entered into peace talks with the militants.
4. •
   To be relevant; to be a contributing factor in.

   • He did the crime and will go to jail - the fact that he did not know it was illegal does not enter into it.