boulder

firm; stable; rock

variant of 涅槃[nie4 pan2]

see 磐安縣|磐安县[Pan2 an1 Xian4]

Pan'an, a county in Jinhua City 金華市|金华市[Jin1 hua2 Shi4], Zhejiang

Panshi, a county-level city in Jilin City 吉林市[Ji2 lin2 Shi4], Jilin

solid as a boulder (idiom); absolutely secure; rock-firm and unyielding

rock-solid

as solid as rock (idiom); as sure as houses