关紧

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

CEDICT

  1. 北方方言。指要紧。
  2. 把东西栓紧，使其密合。

重編國語辭典

Entry Composition

1 关 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 紧 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

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

I forgot to lock the drawer.

Source: Tatoeba

锁定 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
闭锁 bìsuǒ to lock
锁掉 suǒdiào
  1. lock up
  2. lock out
  3. to lock