要害堅固

Reading

Kana: ようがいけんご

Romaji: yougaikengo

Definition

noun

adj-no

1

(a fortress being) impregnable; unassailable

Note: yojijukugo

Kanji

要

Readings: ヨウ、 い.る、 かなめ

Meanings: need, main point, essence, pivot, key to

害

Reading: ガイ

Meanings: harm, injury

堅

Readings: ケン、 かた.い、 -がた.い

Meanings: strict, hard, solid, tough, tight, reliable

固

Readings: コ、 かた.める、 かた.まる、 かた.まり、 かた.い

Meanings: harden, set, clot, curdle