tegar hatiBahasa Indonesia

Tenaciously unwilling or marked by tenacious unwillingness to yield

English: stubborn, obstinate, unregenerate

Bahasa: gigih, tegar, tekak, berkeras, bandel, bengal, dakar, nekad

Impervious to pleas, persuasion, requests, reason, she would have none of him"- W.Churchill

English: adamant, adamantine, inexorable, intransigent

Bahasa: tegar, berkeras, degil, keras hati, keras kepala

Less certain link between this word and this sense.