jiān​bì

to fortify

坚壁 堅壁 jiān​bì
to fortify
(literary) to strengthen or fortify a wall or defense for protection against an enemy
fortress
(literary) a solid wall used for defense; a strong fortress
to cache
to hide supplies, weapons, or grain by moving or concealing them so they do not fall into the hands of an enemy

Frequency

Written text
0.081 per million

Sources

Frequency data
BCC Corpus (BLCU)