厳に

げんに
strictly
severely
rigidly
fortify
strengthen
secure

* * *

げんに【厳に】

strictly; severely; rigidly. [⇒げんじゅう²]

●厳にする strengthen; fortify; secure

・防備を厳にする strengthen [fortify] the [one's] defenses

・警戒を厳にする keep strict guard [watch].