the central part of a country, historically, commonly known as the capital city or the main region, where an emperor or other ruler resides / something within a country

Short for 中国地方 (Chūgoku chihō): the Chūgoku region of Japan

a surname

root / base, foundation

perseverance, patience / (arithmetic) root

astronomer

astronomical (relating to astronomy) / astronomical (vast)

meaningless

nonsense / meaninglessness

profound, deeply meaningful