ろうこ 牢固 LinksSentence search for 牢固Sentence search for ろうこSentence search for 牢乎Kanji details for 牢 and 固Edit in JMdict 'taru' adjective, Adverb taking the 'to' particle1. firm; solid; inflexible; immovableOther forms牢乎 【ろうこ】 Discussions Log in to talk about this word.