[つよい, tsuyoi] (adj-i) (1) tough; stiff; hard; (2) inflexible; obstinate; stubborn #1517
[いってつ, ittetsu] (adj-na, n, adj-no) obstinate; stubborn; inflexible
[がんめいころう, ganmeikorou] (n, adj-na) obstinate; stubborn; hard-headed; being incapable of making sound judgments because of a narrow, inflexible and obstinate mentality
[ころうがんめい, korouganmei] (n, adj-na) obstinate; stubborn; hard-headed; being incapable of making sound judgments because of a narrow, inflexible and obstinate mentality
[しゃくしじょうぎ, shakushijougi] (adj-na, n) a hard-and-fast rule; stick fast to rules; a stickler (for rules); hidebound system; inflexible
[いしあたま, ishiatama] (n, adj-na, adj-no) inflexible person; (P)
[あたまがかたい, atamagakatai] (exp) (See 頭の固い) thickheaded; obstinate; inflexible
[あたまのかたい, atamanokatai] (adj-i) (sens) (See 頭が固い) obstinate; inflexible; thickheaded
[ふとう, futou] (adj-na, n) unbending; inflexible; tenacity; indomitableness
[きぶつかなぶついしぼとけ, kibutsukanabutsuishibotoke] (exp) inflexible people; heartless people; Buddhist images of wood, metal, and stone