时效 shí xiào

effectiveness for a given period of time

Word data

HSK Not in HSK
Frequency 30336th word

Definitions

  1. 1. effectiveness for a given period of time
  2. 2. prescription (law)
  3. 3. aging (metallurgy)

Characters

Character Meaning
时 shí HSK 1
time; when; o'clock
效 xiào HSK 4
effect; efficacy; to imitate