牢固たる

(1)immune to attack; incapable of being tampered with; "an impregnable fortress"; "fortifications that made the frontier inviolable"; "a secure telephone connection"

(2)攻撃に対しての免疫がある

(3)変更されることが出来ない

(4)securely established; "holds a firm position as the country's leading poet"

(5)しっかり確立される

(6)marked by firm determination or resolution; not shakable; "firm convictions"; "a firm mouth"; "steadfast resolve"; "a man of unbendable perseverence"; "unwavering loyalty"

(7)固い決心または決意を特徴とするさま

(8)弱めることができないさま

(9)not making concessions; "took an uncompromising stance in the peace talks"; "uncompromising honesty"

(10)譲歩をしない

(11)not subject to revision or change; "a firm contract"; "a firm offer"

(12)改訂や変化に従わない

(1)