關緊

关紧
guānjǐn
  1. to close firmly
  2. to fasten securely
  3. to make fast
  4. to lock

CEDICT

  1. 北方方言。指要緊。
  2. 把東西栓緊，使其密合。

重編國語辭典

Entry Composition

1 關 guān
  1. mountain pass
  2. to close; to shut; to turn off
  3. to confine; to lock (sb) up; to shut (sb in a room, a bird in a cage etc)
  4. to concern; to involve
2 緊 jǐn
  1. tight
  2. strict
  3. close at hand
  4. near
  5. urgent
  6. tense
  7. hard up
  8. short of money
  9. to tighten

Related entries

鎖上 suǒshàng
  1. to lock
  2. to lock up
我忘记锁上抽屉了。

I forgot to lock the drawer.

Source: Tatoeba

鎖定 suǒdìng
  1. to lock (a door)
  2. to close with a latch
  3. to lock into place
  4. a lock
  5. a latch
  6. to lock a computer file (to prevent it being overwritten)
  7. to lock (denying access to a computer system or device or files, e.g. by password-protection)
  8. to focus attention on
  9. to target
閉鎖 bìsuǒ to lock
鎖掉 suǒdiào
  1. lock up
  2. lock out
  3. to lock