has been coring

• present perfect progressive

  present perfect progressive

  Used to describe an action that began in the past, has continued continuously, and is still in progress.

  of core (3rd person singular).
  core

  noun

  the central part of a fleshy fruit, containing the seeds.

Related Words

• basis
• body
• bottom line
• crux
• essence
• focus
• foundation
• heart
• importance
• nucleus
• origin
• root
• substance
• thrust