ichidan verb, transitive verb
seal (a letter, container); close tightly
Physical act of sealing something shut, such as an envelope, a container, or a room.
手紙を封じてから投函した。
I sealed the letter and then mailed it.
窓を板で封じる。
Seal the window with boards.
ichidan verb, transitive verb
block; prevent; suppress; seal off
Metaphorical extension: to stop movement, speech, access, or activity. Common in phrases like 口を封じる (silence someone) and 出入り口を封じる (seal off an entrance).
See also: 口を封じる
証人の口を封じるために脅した。
They threatened the witness to silence them.
警察は建物を封じて捜査を始めた。
The police sealed off the building and began their investigation.