had been firming

• past perfect progressive

  past perfect progressive

  Used to describe an action that was ongoing continuously in the past up until another past event interrupted it.

  of firm.
  firm

  adjective

  not soft or yielding when pressed; comparatively solid, hard, stiff, or rigid.

Related Words

• adamant
• consistent
• determined
• explicit
• flat
• persistent
• resolute
• specific
• stable
• staunch
• steadfast
• steady
• strict
• strong
• tenacious
• unflinching
• unshakable
• unwavering
• unyielding