茲事體大 zī shì tǐ dà

DEFINITIONS

  1. this is no small thing (idiom)
  2. to have a serious matter at hand

CHARACTERS

茲 zī now, here; this; time, year
事 shì affair, matter, business; to serve; accident, incident
體 tǐ body; group, class, body, unit
大 dà big, great, vast, large, high