堅牢 けんろう Meanings な-adjective, Noun solid; strong; sturdy; durable; stout Kanji 堅 firm. Read as ケン. 牢 prison; jail; hardness. Read as ロウ. Example sentences 建築物は、現在では昔よりずっと堅牢になっている。Buildings are much stronger now than they used to be. Words containing 堅牢 堅牢堅固 (けんろうけんご) firm and solid Jinuma: Japanese Dictionary · Word lists