地じ盤ばん沈ちん下かMeaningsNounSuru verbIntransitive verb1. land subsidence (Yojijukugo)2. decline in influence (Yojijukugo)Kanji used地ground盤plate沈sink下belowPitch accentじばんちんかComposed of地じ盤ばんground; crust (earth); bed (gravel, river, etc.); foundation (building, etc.); base; constituency; power base; support (electoral); footing; footholdNoun沈ちん下かsinking; subsidenceNoun